Natsu vs Aang

Chaos had fallen on Magnolia, with Aang unable to control himself; he had lost all reason and restraint as he had carelessly attacked his friends. Luckily, there was one person left that stood in his way.
"I won't hold back Aang!" Natsu roared as he sprinted to the Avatar, his hands engulfed in flames. "Fire Dragon Iron Fist!" His right first was engulfed in flames, but Aang, who was still in his elemental sphere, held Natsu back with a huge gust of air. The amount of wind he put out was also able to put the flames on Natsu's right fist out.
Aang shot bullet like debris from two rocks that formed the earth ring, This hit the Dragon Slayer, forcing him backwards into the ground. Natsu got back up with some small rips in his waist coat. He jumped to his feet from his back.
"Is that all ya got?" Natsu taunted. Aang took this as a challenge and made three columns of twisted earth speed towards Natsu, but Natsu engulfed his fist in flames and punched the earth protrusions to pieces. He saw Aang slowly rising into the air within his elemental sphere. Natsu took advantage of the time Aang had given him and sprinted to Aang once again. His right hand was engulfed in his flames yet again. "Fire Dragon…" Aang covered his arms in iron scales and raised them to guard his face; this forced a smirk from Natsu as his punch impacted Aang's arms but the flames had fizzled out. Instead, Natsu powered up his flames on his right foot. "...Talons!" He swung his leg to make contact with Aang's gut, sending him to a building where his back made a loud impact. "Are you ready to snap out of it yet?" Aang got to his feet while breathing heavily. "So that's a no."
Aang took a deep breath. "Fire Dragon Freezing Roar!" He expelled blue, freezing fire from his mouth.
Natsu retaliated with his own fire breath. "Fire Dragon Roar!" Both fire breaths collided making a cloud of steam. Natsu charged through the cloud after they ceased their attacks. Natsu was engulfed in flames before spearing into Aang and colliding into his stomach. But as he was pushing Aang back, the Avatar's feet dug into the ground slowing down both of their momentums. Aang magnetized rocks to his arms to make large earth gauntlets and use them to slam them down onto Natsu's back.
Right after the Dragon Slayer hit the ground, a pillar propelled him high into the air. Aang engulfed himself in an air sphere and sped towards Natsu. When he saw the Avatar getting closer, he hatched an attack. "Fire Dragon Brilliant Blaze!" After engulfing both his hands in fire and forming a colossal fireball, he then chucked it to Aang's air sphere. Making an explosion that made Aang stagger in the air, he created Air scooters on his feet to keep himself from falling but Natsu, his face distorted in rage, speared into Aang with orange jets of fire discharging from his feet.
Both battlers were speeding through the air as they headed for the East Forest. "They are going to crash into the East Forest!" Happy cried, seeing the sight.
"Then that is where we will go." Erza said after she re-quipped back into her regular armor.
"We're coming with you." Katara said with Lucy, Sokka and Happy beside her.
"Don't count us out…" Toph said with Zuko and Suki at her sides.
"Fine," Erza agreed. She looked back at the others to see Mai, Ty Lee, Cana and Levy helping the wounded.
"We're fine here you guys can go ahead," Mai said, holding an unconscious Mira over her shoulder.
Erza nodded and she, along with the others that agreed to go, followed her.
"Mai, you think Natsu can beat him?" Ty Lee asked.
"Here's what I think. If he can't then we have no choice but to kill him," Mai replied. "Of course that itself is no small feat, but I'm hoping it doesn't come to that…"
"Me too..." Ty Lee looked to the ground before perking herself up. "But I believe in Natsu, he's the strongest person I know. And let's not forget the cutest." Mai rolled her eyes at her remark.
----A ball of tremendous energy was seen speeding to the East Forest and landed with such tremendous force that it made a gigantic crater, pummeling some of the trees that used to stand there.
"Now that we are here, I don't have to hold back!" Natsu declared. Right after he said this, he took a deep breath. "Fire Dragon's Roar!"
As the huge stream of fire was speeding to him, Aang took in as much air as he could and prepared his attack. "Fire Dragon Gusting Roar!" A burst a flames combined with a vertical cyclone of air made a vertical fire cyclone speed through Natsu while canceling out his flames. This huge burst of flames made a large line of destruction as many trees were either burnt to ashes or on fire after the attack.
Natsu however looked completely unharmed. He raised his arm to his mouth and rubbed his fist past it. "Thanks for the meal, Aang!" he said with a smirk. His fists were quickly engulfed in flames. When Aang figured out that fire wasn't going to beat Natsu, he switched to a different tactic, but not before Natsu struck first. "Fire Dragon's Iron Fist!" Natsu sped to Aang with fire over his right fist.
Aang's arms became covered in iron scales. "Iron Dragon Hard Fist!" his right hand that was covered in iron scales made contact with Natsu's fiery fist and both combatants flew back as the attack made an explosive shock wave. Natsu shook his right hand after making contact with the iron fist, but he saw that Aang wasn't close to done with him. "Iron Dragon's Roar!" Aang shot a burst or iron shards towards Natsu and the Fire Dragon Slayer was engulfed in it forcing him back even further.
Natsu jumped upwards after Aang's attack; both his arms were covered in long whips of fire. "Fire Dragon Wing Slash!" He brought the long whips of fire down towards Aang who shot himself in the air by using an earth pillar. Natsu created a huge ball of fire. Aang saw this and began to absorb the water from many of the grass, trees, leaves, and bushes around him to create a ball of water around the same size. He threw it down to the oncoming fireball which managed to put it out, resulting in a huge explosion of steam. When it cleared, a huge blast of air shot through it but Natsu was able to avoid it and jumped onto a tree branch. He saw Aang and jumped towards him with a fiery fist. The Avatar turned his head and he made a line of thick columns collide into Natsu before he hit the ground.
The Dragon slayer landed on his feet, while sliding back. Natsu gave a wide grin. "You sure ain't pullin' any punches are ya?"
Aang sprinted towards Natsu and appeared in front of him in a flash. He forced an earth column into Natsu's gut sending him flying back, and then adjusted himself in the air and landed on his feet as Aang sent a boulder towards him. Without activating his flames, Natsu threw a punch at the boulder, shattering it to pieces. As the bits of rock fell, Natsu directed a furious glare towards Aang. "I'm done bein' pushed around," Natsu growled as he engulfed himself in flames. "Fire Dragon's Sword Edge!" He raced towards Aang.
But Aang wasn't going to let him finish off the attack. He blew a huge gust of wind that stopped Natsu's momentum, forcing Natsu to hang onto the ground to keep from being blown away. The flames surrounding him were fizzled out by the winds. After seeing that a direct attack was useless, Natsu ejected himself into the sky before engulfing his feet in flames. "Fire Dragon Talons!" As he sped back to the ground, Aang made a jagged column rise from the ground to block Natsu's kick but it shattered to pieces. Once Natsu hit the ground, he gave a kick with his left foot that sent Aang speeding to a tree, upon impact he let out a painful grunt.
Natsu loosened his stance a little in case Aang would return back to normal, but that didn't happen as rocks were thrown in Natsu's direction. He dodged them, and for the ones that he couldn't avoid he punched to pieces.
"Wake up, Aang! Don't you see what you're doing!?" Natsu roared before he threw a fist that connected with Aang's fist, creating barriers of wind and fire around them. Both battlers jumped back and Aang had his right fist on top of his left palm.
"Ice-Make: Claws!" His arms were covered in a cold wind before thick, sharp animalistic claws made of ice stretched from his forearms and past his hands. He launched to Natsu and threw slash after slash, but Natsu made sure to avoid the scratches, and he engulfed his entire body in flames just to make Aang stagger back from the brightness. Once this was achieved, he punched Aang in the face making him stagger back further, as his ice claws shattered.
"Fire Dragon Sword Edge!" He shot towards Aang and collided into him while covered in raging fire. The duo flew past various trees, all the while Aang taking substantial damage.
Looking down at the fight from a raised area of the forest was Porlyusica watching with a distasteful look on her face. "Fairy Tail's Dragon Slayer and Elemental Wizard are clashing… Are those two trying to cause a disaster? At this rate, those two will destroy the entire forest."
Natsu was flying upwards after being hit with an earth pillar. Aang had flown upwards while surrounded by an Air Sphere. After pushing Natsu high into the sky, he shot him back down to the ground with a huge air blast. Natsu got back up and he shot a stream of fire from his mouth, but the Avatar bent the fire around his air sphere. Pieces of rocks and water had joined him and he formed a combined fire, water, earth and air attack that sped to Natsu. When the attack hit Natsu, an explosive line of destruction was made that spread across the forest.
Natsu was inside a small crater with plenty of destroyed trees; he weakly got up and saw Aang speeding down towards him with his arms covered in iron scales. Natsu crossed his arm to block a punch from the torpedoing Avatar, the impact making the crater deeper making a huge cloud of smoke. Attacks of fire and air were seen through the smoke cloud. Both Natsu and Aang were speeding through the forest while throwing blinding punches and kicks made of fire and air. As their feet hit the ground, Aang swiped his leg across both of Natsu's legs, and before he hit the ground, Aang shot a Strong wind blast that hit Natsu's chest forcing him to fly backwards into a boulder.
After Natsu crashed into the boulder, pieces of rubble landed in his hand. He quickly crushed the rubble into dust. "I promised that I would stop you if this happened…I'm going to keep that promise!" He was completely covered in fire. "I hope you can hear me Aang! 'CAUSE I'M GONNA KICK YOUR ASS!" he screamed with veins appearing on his muscles.
----Erza, Gray, Zuko, Katara, Sokka, Lucy, Toph and Suki with Happy flying beside them were going into the forest where the fight was taking place.
They heard explosions all around the forest. "I'm worried…" Katara said.
"This was a bad idea…" Sokka started. "Aang made short work of everyone else - what makes you guys think that Natsu can beat him?"
"You should never underestimate Natsu, Sokka," Gray said.
Toph backed Gray up. "I agree, Natsu may be the biggest child I've ever met, but I was there when he faced Gajeel. He was unstoppable. When he gets in the mood, nothing can stop him!"
"I don't know…" Sokka said, still sounding skeptical.
"You just haven't seen Natsu when he's serious," Erza said. "But, I have." She thought back to when Natsu and Aang teaming up to beat Jellal. "Natsu has mastery of power that very few in our entire world can hope to comprehend. Once he unlocks the true power of the Dragon, all adversaries will fall in his wake."
"I've seen his power first hand…" Zuko added. "It is nothing like I've ever seen before."
"I guess, but that still doesn't ease my worry." Katara said truthfully.
Before the conversation could continue, they heard an explosion of fire. "…I'M GONNA KICK YOUR ASS!"
"Natsu's getting serious!" Happy stated.
"Then we have to hurry." Erza said.
----"Fire Dragon Iron Fist!" Natsu threw a powerful punch but it was blocked by an earth wall quickly erected by Aang. "I'm not going to hold back anymore!" His fist broke through the wall and met with Aang's face, sending the Avatar rocketing through the forest. After Aang landed on the ground he got back up and prepared to cast another spell.
"Ice-Make: Rose Garden!" Aang made a tremendous rose garden of ice speed towards Natsu.
"Back for more, come and get it!" Natsu yelled. Despite The wave of ice speeding towards him, Natsu stood tall. The ice rose garden engulfed Natsu. Soon Aang ran over to Natsu with his arms covered in iron scales. But before he could punch Natsu, his fist was grabbed by Natsu, who forced it out of the ice. From inside the icy prison, red orbs were glaring at Aang's figure. "Is this really the best you got?!" Natsu roared. He and Aang were engulfed in flames before the ice shattered. "Fire Dragon's Roar!" Natsu shot flames from his mouth; Aang blew a powerful gust to Natsu's flames but he couldn't smother them, and Aang jumped back while Natsu glared at him.
Aang placed his fist on his palm. "Ice-Make: Dual Rose Blades!" Ice blades with frozen rose vines appeared on Aang's arms. While speeding to Natsu, he swung the long blades in quick succession but it was avoided as Natsu ducked under it. Aang saw the opportunity and threw his blade downwards and it hit the ground after Natsu rolled away. The resulting ground impact of the sword sent a huge ice line down the forest which froze instantly.
Natsu saw that he had an opening and instantly took it. "Fire Dragon's Talons!" his flame covered right foot swiped into Aang's face, sending Aang digging into the ground causing his swords to shatter.
Aang made an earth platform that raised him into the air. Natsu began running up the platform to meet with Aang, so the Avatar made iron scales cover his right arm and a grayish green magic seal appeared in front of his fist. "Iron Dragon's Hard Fist!"
"Fire Dragon Iron Fist!" both of their fists made contact making an explosion that completely shattered the pillar they were on to pieces. They both slid backwards away from each other. "I'm gonna have to eventually put you down, so I'm going to make this quick!" his hands had orbs of raging flames surrounding them. "Dragon Slayer Secret Art!" he ran towards Aang with his fists ablaze.
Aang still had the iron scales surrounding his arms and he jabbed them into the ground, forming thin earth gauntlets around the iron scales.
"Crimson Lotus: Fire Dragon Fist!"
"Iron Dragon: Quartz Punch!"
Both of them met in the air and were through relentless punches at each other; Natsu's punches were throwing off fireballs and creating smaller explosions while Aang punches were chipping off bits of the iron and rock around his arms and using them as projectiles to aid in the damage of his attack. Both battlers were screaming their lungs out as they let their attacks go off.
The group arrived at the part of the forest where their fight was taking place. Katara had her hand over her mouth in shock to see how Aang was still fighting off Natsu, she had never seen him fight with such intensity.
"We have to help Natsu!" Lucy exclaimed before she took out one of her keys, her arm was grabbed by Zuko. "But… Zuko…"
"Give him a chance, knowing Natsu he wouldn't kill him, but he is our best option in defeating Aang right now."
"Then shouldn't it be more important to help him!?" Suki argued.
"Natsu would want to do it by himself…" Happy seriously stated.
"That's how that idiot wants it; we all had our chance to fight off Aang. We should let him get his." Gray said.
"Watching this makes me feel uneasy." Katara admitted.
Erza looked at the battle closely; even she couldn't tell if Natsu could stop Aang's rampage… so she hatched a backup plan. "Happy, I need you to fetch Warren. It is very important."
"Aye sir!" Happy flew back to the city as fast as he could.
"What was that all about?" Toph asked.
"It's a backup plan…"
Back with the fight both Aang and Natsu landed on the ground panting, but it looked like Aang had taken a lot more damage as bruises and many cuts were all over his shirtless body. "You're still up, I told you I was going to end this!" Natsu saw Aang blasting a tornado of iron shards from his mouth. "This ain't nothin'!" Natsu exclaimed as the shards covered him. "I WON'T LOSE TO YOU!" He ripped off his shirt as flames surrounded him; the roar of a dragon was heard as he was screaming. "Fire Dragon Fist!" He sprinted to Aang while he landed a punch on Aang's left cheek. As Aang slid back, two Magic seals appeared in front of him.
"Fire Dragon's Freezing Roar!" He shot dragon slayer flames through an ice magic circle, turning the flames blue and making them freeze anything on contact.
Natsu stayed still, and as he began sucking up the blue fire into his mouth, his stomach expanded. "Haha, that was the coldest fire I've ever tasted… a bit minty if you ask me." He laughed and he swiped his fist over his mouth with a grin on his face. "Thanks, Aang. Now that I've eaten, I'm all fired up!" Flames appeared on his right fist, and on his left fist… blue freezing flames surprisingly covered that hand. He jumped up high into the air as the different flames on his hand began to grow to a large size. He slammed them together and a large blue fireball with four orange fire rings surrounding it was created. "Fire Dragon's Freezing Blaze!" Natsu exclaimed and threw the huge ball towards Aang.
The Avatar reacted quickly and was in an Ice-make stance. "Ice-Make: Geyser Wall!" A huge wall of ice crystals rose from the ground. Natsu's attack slammed into the wall making a freezing shockwave, destroying the barrier in an instant. There was a circle of thawed ground around Aang, beyond that was a small radius of frozen fauna. He melted the large amount of ice and he formed a nebula of water around him before shooting it at a high pressure to Natsu who was too slow to avoid it. He soon jumped back up to his feet after he was hit with the large blast of water. Natsu surrounds himself in a vortex of fire while Aang surrounds himself in sphere of air.
Katara eyes Natsu with shock evident in her eyes. "I can't believe it; the both of them are putting out so much power. It's actually scary…"
"Let's just hope Natsu can pull it off." Sokka said.
Aang within his air sphere shot towards Natsu, but his momentum was stopped when Natsu quickly kicked him to the ground with his foot. Aang got back up, but was punched in the gut as Natsu had flames shooting out from his elbow. "Still standing? Not for long!"Aang made two powerful blasts of wind that Natsu was only slightly pushed back by it. "Back off! Fire Dragon's Iron Fist!" he punched Aang, making him stagger slightly, but Natsu wasn't going to give him a moment to attack again. "Elbow!" he swiped his right flaming elbow past Aang making him step back even further. "Talons!" he spun in the air and forced his flaming right foot down on Aang who blocked by crossing both his arms, the impact making a small crater in the ground. "Fire Dragon Wing Slash!" he ignited two streams of fire from his hands and swung the streams around to make a huge blunt force of fire that had shot Aang upwards. "This nightmare ENDS NOW!" Natsu bellowed while engulfed in a fiery aura. "Dragon Slayer Secret Art! Crimson Lotus: Exploding Flame Blade!" Natsu exclaimed. Long whips of fire surrounded his arms and he swiped his arms in a circular fashion creating powerfully destructive flames in a large cyclone that kept barraging Aang. While in the flames Aang was seen taking huge damage, the flames shot him high up into the air as they began to go out and create smoke.
Aang hit the ground and he didn't look to be getting back up as the arrows had finally disappeared and the glow faded from his eyes. They had no pupils which showed his defeat…
Katara and Suki were completely speechless while Sokka's jaw fell to the ground.
Natsu begins to slightly limp to the ground. "Haha, I told ya I could handle him." He falls to his knees and starts to catch his breath.
"Take it easy Natsu…" Suki said. "That was some fight you had." She, Sokka and Zuko helped Natsu up to his feet.
"Sheesh!" Gray said. "You two idiots went overboard; the entire forest was nearly destroyed thanks to the both of you."
Toph shrugged her shoulders. "Eh, it's better than destroying the city. I bet gramps would totally freak out!" Toph's eyes quickly grew wide in shock as she sensed something coming from Aang's direction. 
"No!" She whispered frantically.
"What is it!?" Gray asked.
"Impossible… Aang… is getting back up!" She exclaimed.
They all looked to where Aang fell and saw he was on his feet, and he was back in the Avatar State.
"There is no way!" Gray exclaimed. "How is he still standing!?"
"What has the magic done to him!?" Katara asked, horrified.
"I had a feeling this would happen," Erza said. This caused the group to look to her. "It would seem that his body is permanently locked in the Avatar State."
"Erza… what's going to happen to him?" Lucy asked.
"There has to be a limit to how much magic his body can expel. Some of the spells he was casting are too powerful for his body to take. If he continues to absorb magic like this, he'll get stronger and so will his magic…"
"What are you saying!?" Katara demanded with drops of tears falling from her eyes.
"His body will soon give out if he keeps expelling so much magic… when that happens, Aang will die…"
Katara felt her entire world crumble around her; the information had hit her hard like a ton of bricks. It couldn't end like this, could it? The others were also shocked as well, was Aang really going to die from this?
"Erza!" this was the sound of Happy as Warren was following behind him. "I brought Warren like you asked."
"Please…" Katara muttered. "Please tell me there is something we can do?" She asked with tears strumming down her cheeks.
"There might be… I believe if Warren links someone to his mind, we may be able to help him and put a stop to all of this." Erza said. "If we can talk to him in his mind, we may get through to him."
"Can you really do that!?" Katara exclaimed.
"I haven't done anything like that, but I can certainly try; though I'm not sure what we're getting into… it may be difficult to go into a mind like that?" Warren replied
"Aang is worth the risk, I'll do it! Link my mind with Aang's," Katara declared.
"No… Aang wouldn't want anything happening to you," Lucy said. "So I'll be the one to…"
"I'm goin' in," This was Natsu with a serious look. "I'm going to get Aang back to normal, that's a promise."
Katara held her hand to her heart before looking to Aang who was panting heavily. "Okay, I trust you."
Natsu looked to Aang. "Do it, Warren." Warren placed both his pointing fingers on the sides of his temple as he now tried to read both Natsu and Aang's minds and link them together. Within his mind Warren could see a younger Natsu practicing magic with Igneel which shifted to him being sad about the dragon's disappearance, and finally when he found Happy inside the Dragon Egg.
After going through those memories he went into Aang's mind which showed him using the Avatar State to freeze himself in ice for a hundred years. He began to see the times that Aang was in the Avatar State. The moment when he used the Avatar State to beat Zuko and Iroh during their first encounter in the South Pole, the time when he was sad of Gyatso's death and he began to blow away the temple around him, when he fused with Ocean Spirit La to create massive waves that washed away Fire Nation Ships at the North Pole. The time when he saw Katara sinking into the ground, and finally when he was about to fully unleash the power of the Avatar State right before Azula shot him.
White magic seals appeared below Natsu and Aang's feet, soon after this happened they both collapsed to the floor.
"Natsu!" Lucy worriedly yelled before running to his body.
"Aang!" Katara ran to Aang in a similar worry.
Aang's body was static but his eyes and arrows were still glowing. Natsu on the other hand had his eyes engulfed by a white glow in a similar fashion to Aang.
"Hey, what happened to Natsu?" Lucy asked.
"He's in Aang's mind now… or rather his spirit is."
"As long as his body is safe, nothing bad will happen to him." Katara explained.
"It's all up to you, Natsu." Erza thought.
----Natsu's eyes slowly opened. He saw that he was falling through what seemed to be an endless pit. "What's going on!? Tell me Aang." When he looked up he saw a large version of Aang's face that was locked in the Avatar State and it was glaring at the Dragon Slayer. "AAH!" Natsu yelled as the face spooked him as he continued to fall down the pit.
…
Natsu hit solid ground, though strangely it didn't hurt. "Where am I?" he asked himself. He quickly noted that he wasn't in Magnolia anymore, but on a stone courtyard for what looked like an ancient building. "Did I go back in time or somethin'?" After looking around he saw something that really confused him. "AANGS!" Natsu exclaimed now seeing many bald headed kids with airbender clothing in the courtyard he landed in. "Aangs everywhere!" he yelled. Along with the multiple 'Aangs' he saw Sky bison peppering the skies, many of them in different sizes. Another weird thing was that he was a blue see-through figure, as if he was a spirit. "What the heck is going on?"
"-You have to balance on it like a top, like this." Natsu knew that voice was familiar and saw Aang though he looked a little younger, one year younger to be specific.
"Aang! What's goin' on here!?" He asked but he got no response. "Hey can't ya see me? I'm right here!" He yelled while flailing his arms. "I guess he can't see me, but what is all of this?" Natsu saw five older men in robes of similar colour walk up to the boys Aang was playing with.
"Aang come with us. We need to speak with you." 
After Aang agreed to go with them, Natsu began to follow them. "Hey! Wait up!"
Natsu then followed them into the main temple and was listening to their conversation but he realized what was going on when he heard this: "Aang, you are very skilled as an Airbender, even from a very young age. We believe that this was no accident, and we have determined that you are in fact the next Avatar."
The Dragon slayer now put the pieces together. "Wait, Aang is only just becoming the Avatar… This must be his memories I guess." He thought.
"Normally you were not told of your identity until you turned sixteen, but there are troubling signs. Storm clouds are gathering. War may be coming. We need you, Aang," Gyatso said.
Natsu though wasn't happy about hearing this. "Yeah, no pressure or anything…" He thought. He began to see more of Aang's memories, including when the other kids started acting differently around him because he was the Avatar. "How did they know? Does news travel fast around here?" Natsu wondered. But that wasn't the main issue; they excluded him from playing with them… all for what? Because he was the Avatar, sure that was true but he was still the same Aang. "What kind of friends are they!? It's not like he chose to be the Avatar!" Natsu growled.
The scene changed in front of him to where he Aang and Gyatso where playing Pai-Sho and he chuckled when he saw the older monk cheat in the game to beat Aang. This forced a chuckle from the Dragon Slayer. "Gyatso is to Aang, what Igneel was to me," Natsu noted. "But I don't like how those other monks are putting pressure on one kid."
Natsu was watching the scene where the monks were talking among themselves.
"You cannot keep protecting him from destiny!" one of the monks said to Gyatso.
"Gyatso, I know you mean well, but you are letting your affection for this boy, cloud your judgment." another one of the monks added.
"All I want is what is best for him," Gyatso said.
"But what we need is what is best for the world. You and Aang must be separated. The Avatar will be sent to the Eastern Air Temple to complete his training."
Natsu glared at the scene in front of him. "They separated him from Gyatso, just to prepare him to save the world…" As he glared at the scene he got mad. "AANG IS JUST A KID!" he exclaimed while he willed flames to surround him… though his flames were non-existent because he was just a spirit in Aang's mind after all. Just like bending, he couldn't use his magic here. "So...I can't use my magic here."
The memories take Natsu to where Aang was running away while leaving the scroll explaining everything. Natsu is seen hovering in the air. It quickly shows Aang and Appa drowning in the storm and Aang using his Avatar State to freeze himself in ice to preserve his body. He then sees Aang being broken out by Katara and Sokka by the Southern Water Tribe. "So this is where it all started?" Natsu said to himself.
Aang's memories now quickly showed themselves to Natsu. He sees all of Aang's adventures like him taking Sokka and Katara to Omashu for the first time, to the events of the Winter Solstice and Aang fighting off the Fire Navy ships when he was fused with La's spirit form.
Natsu saw the moments when he was forced into the Avatar State by General Fong when he sank Katara into the ground, his first battle with Toph where he 'earthbent' her out of the ring. Natsu actually found a lot of humor in that. He briefly saw Aang's battle with both Azula and Zuko in the abandoned town. "Who was that girl?" Natsu wondered thinking about Azula.
He then sees the events that happened in the catacombs of Ba Sing Se and he had a good look of the girl that shot Aang in the back with lightning. "Is that the girl Zuko was talking about?" After seeing this the area around him shifted to when Aang and a huge team were going to invade the Fire Nation on the day of Black Sun, he saw Aang and Katara talking with each other on top of one of the submarines that was designed by Sokka.
"We've been through so much together, and I've seen you grow so much." Katara started. "You're not that goofy little kid that we found in the iceberg." Aang blushed at her compliment. "What I'm trying to say is… I'm proud of you."
"Everything is going to different after this?" Aang asked.
"Yes it is." Katara replied moving her long hair over her shoulder.
Natsu could hear Aang's nervousness. "What… what if I don't come back?"
"Aang don't say that." She quickly replied. "Of course you'll-" she was interrupted when Aang moved closer to her and pressed his lips against hers. She closed her eyes after the initial surprise. Aang moved back and Katara blinked several times before she saw Aang open his glider and fly off to the Fire Nation.
Natsu was blinking in surprise at what he just saw before chuckling. "Aang you sly dog." He said with a smirk.
…
Finally, Aang's memories take him to the Wulong Forest where he had his epic duel with Ozai. "Is that Ozai?" He saw the shirtless Fire Lord with his long hair, and long, thin beard. As he saw Aang fighting him off, Natsu scoffed at the display of Ozai's firebending. "I can totally take him; he looks like a total pushover." He saw Aang curling up into an Earth ball to hide from him.
As Aang cowered inside the ball Ozai chuckled. "You're weak just like the rest of your people. They didn't deserve to exist in this world – in my world! Prepare to join them. Prepare to DIE!" Natsu clenched his fists in anger as he saw Aang struggling to beat Ozai.
He was met with other bits from Aang's memory before everything went dark.
----Natsu who was still in spiritual form, found himself in a dark area with an echo. "Hello…! Is anyone here?" as soon as he said this, a stone floor lit up and he saw that is split five ways to five human figures. The area itself lit up as it looked like they were all floating in the darkness of space. A huge, dark figure of Aang with his eyes and arrows lit up was a further distance away. In between his hands was a ball of air that was surrounded by rings water, fire and earth. Upon closer inspection he saw the ball of air had shards of metal close to the earth along with shards of ice with a freezing mist around the air sphere, and finally there was a second ring of flames that surrounded the air sphere.
As he traversed deeper into Aang's subconscious he found that his body was returning to normal but was still unable to use his magic. "What's going on here?"
"Who are you?" Natsu heard. The source of the voice came from one of the five figures ahead of them revealing themselves to be Aang's past lives… well at least four of them were. "You aren't meant to be here. State your purpose." Yangchen, Kuruk, Kyoshi, Roku and Ur were staring down at Natsu. Roku was revealed to be the one talking to him.
"I'm Natsu Dragneel, I'm here to snap Aang out of the Avatar State," he declared.
"If you are looking for Aang…?" Yangchen pointed to the giant Aang figure. "He is over there." Natsu noticed that Aang was inside the air sphere surrounded by the other elements. Natsu ran over to the giant Aang figure.
"Why are you here?" Kyoshi asked harshly.
"Aang has gone crazy and I'm here to stop him." Natsu replied.
"So you have taken it upon yourself to stop him on a subconscious level." Kuruk stated.
Roku began to explain. "The ethernanos that Aang's body has absorbed can only be utilized in the Avatar State, but Aang has yet to control the Avatar State and as a result, he cannot control the magic he uses in this state anymore. It has become a prison."
"Not if I can help it!" Natsu growled.
"Even if you get him out, what then…?" Ur asked. "This will all happen repeat itself if he goes into the Avatar State again."
"That's why… I'll get him to unblock his seventh chakra." Natsu said.
"He seems reluctant, how will you convince him?"
"Just trust me, but this is the only way to stop him."
"Natsu Dragneel, it is obvious that you have formed a strong bond with Aang. It is for this reason that we will allow you to communicate with him." Roku said Suddenly a curved purple path appeared which led to Aang in his elemental sphere
Natsu ran up the path to meet Aang inside the elemental sphere. "Aang! I'm going to snap you out of this!" When he got there he looked at Aang's meditative stance and saw his arrows were glowing. Natsu didn't know how to wake him up so he went with this: "AANG! YOU BETTER WAKE UP OR I'LL KICK YOUR ASS!"
Aang's eyes shot open in shock, the elemental sphere went down, and Aang's arrows faded. "Natsu?!"
"Surprised to see me?" Natsu asked with a smirk.
"What's going on, how did you get here?" Aang asked as he landed on the purple path that Natsu ran up.
"It's a long story, but you went into the Avatar State and you went crazy…"
Aang's had a panicked look in his eyes. "Oh no, I-I didn't hurt anyone, did I?"
Natsu placed his hand on his shoulder. "A few bruises here and there, but nothing members of Fairy Tail can't handle." Aang gave a faint smile.
"And Katara…?"
"She's really worried about ya, but Aang you need to stop this."
"How?" Aang asked.
"You know how."
"But Natsu if I do that… I just can't choose this power over Katara… I just can't…"
"Even if the worst happens, you said that those feelings can be reborn in the form of the people that surround you..." Natsu said.
Aang faintly smiled as he remembered this is what he said to Natsu when he thought of Lisanna. "Wow, I can't even take my own advice."
"Don't worry Aang, I'll make sure everything turns out alright, that's a promise."
Aang smiled as he nodded. "Okay… I'll do it." Aang walked back to the giant figure of himself and was surrounded in blankets of spiritual energy as he concentrated on trying to unblock his final chakra. The eyes and arrows of the giant Aang shone brightly and a bright white magic seal appeared on the chest, one that wasn't familiar to either of them.
Aang walked out of the blanket of spiritual energy and moved towards Natsu who was at the bottom of the curving path. "So?" Natsu asked.
"I think I did it," Aang said in a sigh of relief.
"Great, now just one last thing I gotta do." Natsu placed his finger on the crown of Aang's forehead. Right after this happened Aang's eyes were engulfed by a white glow and his vision was filled with memories of Katara. When he first met her, how she looked when she wore the necklace he made for her, when they kissed in the Cave of Two Lovers, the time they were dancing when the fire nation kids had come over to the cave they were hiding out in.
"Wait… I know her!" Aang realized.
"You should, you like her a lot," Natsu said.
"Katara! I remember." He looked to Natsu. "Thanks but, how did you-"
"I've been seeing all your memories before I got here, I just had to jog yours a little."
"Wow, Natsu… how can I ever repay you?"
Natsu looked to Aang's past lives. "You can tell me who these guys are."
"Oh, well they are all previous Avatars that came before me."
He could easily determine what Nation each of them were from... almost all of them. Natsu looked to Ur. "Hey, what Nation are you from? I can't tell with the clothes you're wearing."
"I'm not a past life per-se." Ur admitted.
"Actually, that is Ur, Gray's teacher. She is the one who made it so my body can absorb magic. I guess after that, a part of her spirit will always be with me since I bent her…"
Natsu knew who Aang was talking about. "Oh…" he pointed to Ur. "So you're the one who taught Gray how to strip huh?" he asked with a simple expression.
"WHAT!?" she comically yelled, a vein popping on her forehead. "I never… WHAT HAS THAT BOY BEEN TELLING YOU!?"
Aang and Natsu both laughed at the scene. Roku looked at Natsu. "It was an amazing thing you did, Natsu Dragneel. We shall never forget this."
"We should get back, everyone misses you." Natsu said. "Especially you-know-who…" Natsu teased with a smirk.
Aang looked away and blushed. "You don't have to bring it up all the time…" White seals appeared below Natsu and Aang engulfing them in white light before they disappeared.
----In the forest that Natsu and Aang almost desecrated the rest of Fairy tail had met up with the others. It Natsu who opened his eyes first. He noticed he was looking up at Lucy, Happy, Zuko, Erza and Gray "He's waking up!" Lucy exclaimed. Natsu sat up.
"So did you do it?" Gray asked.
Natsu smirked. "See for yourself," he said jerking his thumb to where Aang was. His head was resting on Katara's lap.
His eyelids were twitching and a groan was heard. His eyes slowly opened, revealing big gray eyes. His vision was met with Katara smiling at his tired face while tears were falling down her cheeks. "Hey Katara…" he said weakly.
"Aang!" she exclaimed. "You're okay!" She helped Aang sit up.
He noticed the scratches, burn marks and torn clothing on her. He looked down in shame. "I hurt you…"
"That doesn't matter!" she exclaimed as she hugged him. "I could have lost you, you weren't in control it wasn't your fault, a few burns and bruises is nothing compared to losing you forever."
"I'm sorry… for putting you through this… for putting everyone through this."
"At least you came back. Thank you."
Katara let go of him. "Thank him." He pointed to Natsu. "He's the one who brought me back."
"Natsu…" she slowly walked to him as he stood up. She hugged him. "Thank you Natsu. Thank you for saving him."
"Yeah sure, no prob." Natsu said with a smile.
"I should also thank you Natsu." Aang said. "Because of you, I can do this…" Aang stood up and his arrows and eyes had glowed temporarily before his eyes returned to normal, but his tattoos remained glowing.
Aang shot a stream of fire before turning and following with throwing a blob of water from the ground and he proceeded to shoot ice lances at it. He made a line of earth speed down the forest by stepping hard on the ground after turning again. Right after he made the earth wave he surrounded his right arm in iron scales and he made an air cyclone raise him above the ground as he held his breath before firing powerful flames from his mouth into the sky. As the flames exited his mouth a dragon's roar was heard. He landed back on the ground and his arrows faded. He took a deep breath and looked at everyone before he collapsed to his knees.
"Aang!" Katara and Lucy yelled in worry
"It's great you can control the Avatar State now, but don't strain yourself. You took quite a beating from Natsu." Lucy reminded.
"Oh… that's why I'm in so much pain…"
"Always have to show off don't you?" Katara asked with a smirk.
"I wouldn't exactly call it showing off…"
"Hey!" Toph yelled. "There is still one important thing we forgot…" everyone looked at her with serious faces. "Natsu, Aang… Out of curiosity, who won?" she asked with a smirk everyone accept for Mira and Sokka all comically fainted.
"Oh my…" Mira said with closed eyes and a smile.
Natsu and Aang look to each other. "Heh, let's call it a draw." Natsu said.
"That sounds fair," Aang agreed.
Sokka though wasn't satisfied. "What? Oh come on…? The most epic fight ever just happened and you want to call it a draw!? There should be a rematch! Cana what do you say?"
"Hey, keep me out of this…" She replied turning to Sokka with arms folded.
"Oh man a proper rematch would be so-" he was comically punched in the face by Erza before he was allowed to continue.
"Shut up, idiot!" She exclaimed as she re-quipped into her regular armor.
Aang looked around as everyone was laughing at Sokka's expense. "At least everything is back to normal…"
"Ahem!" everyone turned to see Porlyusica glaring at them. "Aang, Natsu… I have to talk to you about something..." She appeared civil and serious before pulling out her broom and began waving it. "LOOK AT WHAT YOU FOOLS HAVE DONE TO THE FOREST!" She screamed while she began to chase after them while waving her broom. Aang and Natsu were laughing as they were running from her.
Lucy sighed. "Some things never change…"
Katara giggled. "I'll say…" "At least I know Aang is feeling a lot better now…" she thought to herself while looking up to the sky.