Reunion and Farewell

Meanwhile, on the moving Cube, a.k.a Tartaros territory: 
The Face bombs start denote in various areas, slowly removing magic, but in the nick of time, the Dragon parents, Icigoneal, Grandeeney, Metalicana, Weissolgia, and Skiadrum, all zoom in and destroy the face bombs one-by-one. Meanwhile, Igneel fights Acnologia, head-to-head out in the skies.
"E.N.D is no longer a threat you fear, Acnologia, so leave the humans alone!" Igneel demands.
"Fear, you say? Ha! Why would I fear those abominations from Zeref's book? I am the King of Dragon's, Acnologia." He declares.
"You were once human too..." Igneel knows, "I won't let Natsu and the rest of them become like you!"
"The only thing that desires me is to see this entire world destroyed." Acnologia merely replies and goes on to attack him again, "It's DESTRUCTION!"
After destroying some face bombs, Icigoneal notices Igneel soaring up and fighting Acnologia from a long distance, "You guys, I have a favor to ask."
"What?" Metalicana asks.
"You guys mind destroying the rest of the face bombs? I'll go and assist Igneel in taking down acnologia." Icigoneal replies and plans to do.
"I don't know, Igneel seems to have it under control." Grandeeny replies and notices the fight from their distance.
"It'll be even better if we gang up on that lizard and finally put an end to him." Icigoneal replies.
"Hmm, he has a point." Weissolgia kinda gets it.
"Let Icigoneal do it. Our bodies don't have much time left so let's make the best of it and give it all we got." Skiadrum doesn't mind and the dragon's come to an agreement.
"Thanks." Icigoneal flies off, "Their fight sure is far away. Just hope I make it on time." He thought, leaving the other dragon's to destroy the faces.
Meanwhile, Igneel and Acnologia continue clashing, strike-after-strike and blow-after-blow, until Acnologia smashes Igneel toward the ground, and then proceeds to pin him down, crushing the ground beneath them in process from the impact, "It's over, Flame Dragon king." Acnologia proceeds to finish him, but out of nowhere... An Ice Dragon roar rams right into the black dragon's head, sending him flying and right off of Igneel.
"Hmm?!" The dragon king exclaims and recovers from the attack, wondering who did that.
"Where'd that come from?" Natsu watches form the ground and wonders.
"Ice?" Gray noticed.
"That Ice..." Igneel guesses in surprise and recognizes.
"You seem to be having major problems down there, Igneel!" Icigoneal appears, flying in the sky and joins the battle.
"Icigoneal!" Igneel exclaims in surprise at him being here.
"An ice dragon?!" Gray says in surprise.
"Gems come to help Igneel." Natsu figures
"I know that's not you're best, flame-brain!" Icigoneal grins.
"I've sleeping for a long time. Ice breath!" Igneel grins and taunts back, getting up as well.
"They seem to have a rivalry." Sting guesses.
"It looks that way a hundred percent." Rogue agrees and they sweat-drop.
"Heh, all of us dragons were, but it doesn't mean we can't thrash and kill this lizard off." Icigoneal replies to igneel before turning his sights towards the dragon king, who does the same thing as well.
"If it isn't the Ice Dragon king himself." Acnologia speaks, "You're one step away from your grave as well."
"You took the words right out of my mouth." Icigoneal rebukes back, "You're free to rest, Igneel. I'll take it from here, especially since you gave him quite the damage, which makes it easier."
"Ha! An inferior dragon has no right to talk big!" Acnologia flies towards him and Icigoneal does the same, which they butt heads into each other, before clashing and exchanging blows for a minute. Icigoneal punches the black dragon with an Ice diamond fist, but Acnologia easily recovers and rams him back, sending him flying back a bit.
"Even though he fought Igneel, he's still evenly matched with me." Icigoneal though while flying.
"Icigoneal!" Igneel shouts, "Don't interfere, I'm still gonna fight him alone."
"What? Are you crazy?! You already done that and look where it got you!" Icigoneal shouts back at him with a mad look, "In your condition, there is no way in hell that you're taking him alone a second time!"
"Igneel! I'm coming to help too!" Natsu rushes on the ground and looks up at their sky battle.
"You stay there too!" Igneel warns Natsu as well, "You'll get caught in the crossfire."
"I don't care!" Natsu still insists, "If we join forces, he doesn't stand a chance!"
Icigoneal looks down and notices Natsu running, "Isn't that your child, Igneel?" He guesses and can tell, "One thing's for sure, he's right... Acnologia can't take all of us at the same time. We'll gang up on him and finish him for good.
"I was waiting for this moment. To kill Acnologia with my own two hands..." Igneel flies at the black dragon on his last breath.
Ignoring Icigoneal, Acnologia comes at Igneel as well and by the time the clash and fly through each other, Igneel rips off his right arm, while Acnologia does something even worse... he rips igneel's chest in half.
The sight of this shocks Natsu and Icigoneal.
With Igneel's dying breath, "Natsu... I've been watching you all this time... you really grew up... The days I've spent with you... have been the happiest days of my life... you have me the power to love humans."
Acnologia then fired and hits igneel with a dragon roar, vaporizing the Fire Dragon king and he crashes to the ground, dead.
"Igneel!" Natsu and Icigoneal exclaim in shock.
Upon seeing his long-time rival killed, "Bastard!" Icigoneal fires an Ice roar at Acnologia, who counters with his own roar. The two roars collide and cause an explosion, shockwaves sent out.
The smoke clears, Icigoneal flies and looks around for Acnologia, seeing him nowhere, "Where is he?" He then sees Acnologia already at a far distance, retreating out of sight, "Darn, he used that smoke as cover to bail out here, knowing he couldn't handle another fight with his arm ripped off." He says under his breath, but lets it be.
He looks down at Igneel's dead body and gives him a moment of silence before flying down with the other dragons in front of the fairy tail guild.
As the Dragon slayers reunite with their foster dragon parents, it's revealed that they are already half-dead, all because of Acnologia. They hid inside their childrens' bodies to prevent them from Dragonifying.
With that truth revealed and as they foster parents talk with their children, Icigoneal looks around and notices that sueong is not among them, "Wait a minute..."
Grandeeny notices him searching next to her, "You're child isn't here, isn't he?"
"Apparently not, which is very surprising." Icigoneal sighs "That boy... Sueong Ryuto."
"Hold on, there's another dragon slayer under you as well?" Sting asks.
"That's right." Icigoneal nods, "I'm guessing you other dragon slayers haven't met him yet?"
"Nope, we never heard of him either." Gajeel and the other slayers shakes their heads.
"What type of element does he have?" Wendy asks.
"He's an Ice Dragon Slayer." Icigoneal reveals.
"Ice, huh." Rogue gets it, "How are you gonna find him?"
"Oh I know already know where he is, so better go and meet him before time runs out." Icigoneal sprouts his wings, "Plus, he'll definitely sense me automatically as I come nearby." With that said, he flies to where Sueong is and leaves the other dragons with their children.
"Off he goes." Weissolgia sees him off from a distance.
----In the forest: 
Sueong felt the same feeling in his stomach as the other dragon slayers.
"What's wrong, Sueong?" Hiouis checks on him as he kneeled.
"This feeling..." Sueong mutters and immediately recognizes who it is, much to his surprise, "It's Icigoneal!"
The Ice dragon himself flies down and appears right before him.
"Woah..." Hiouis widens his eyes at the dragon.
"Icigoneal..." Sueong doesn't know how to express himself at seeing his foster father.
"I'm glad you're doing well, Sueong." Icigoneal smiles.
"So this is the ice dragon king you've been wanting to find." Hiouis now gets it, "... And he's your parent."
"A cat?" Icigoneal notices Hiouis.
"Oh, I am Hiouis, an exceed." He introduces, "Plus a close companion of sueong, here."
"Really? Great to have a cat companion." Icigoneal smiles, "Grandeeny's girl also had a cat with her, and I think Metalicana's boy too?" He thinks.
"Is that so?" Hiouis is a bit surprised but likes it.
"Icigoneal..." Sueong speaks up.
"Hmm?" The Dragon listens.
"Where have you been all this time?!" Sueong demands answers with a mad look, "I was searching for you all this time even since you abandoned me! What's you're reason for doing that to me, huh!"
"Sueong..." Hiouis mutters, seeing his partner angry.
Icigoneal is silent for a few seconds before replying, "It wasn't because I abandoned you, Sueong."
"Then what was?" He asks and still wants the answers.
Icigoneal then starts explaining the truth, "All this time, I was actually inside of you, to prolong my life."
"Inside me?" Sueong was surprised and widens his eyes.
Icigoneal nods, "Us, dragons, went inside of you, dragon slayers, in order to prevent the dragon seeds inside you all from dragonifying into a monster like Acnologia. It was also to prolong our lives."
"Acnologia?!" Sueong is shocked to here that name, "I ran into him before!"
"Really? When?" Icigoneal wants to know.
"It was a few hours ago after we finished a mission." Hiouis explains, "He appeared before us and sensed dragon slaying magic in sueong, even wanted to kill him, but three of our guild mates held him off and died, all in order for Sueong to escape." Hiouis adds, a little sad by it.
"I see." Icigoneal feels sorry for that.
Sueong is silent for a little before understanding, "Dragon seeds huh. So that's why you hide yourself inside of me... to stop me from turning to a dragon and to extend your life."
"And it's also because Acnologia killed off our souls with his dragon slaying magic, including mine." Icigoneal adds to it.
"What?!" Sueong is shocked at that.
"It's only a matter of time before I go, especially now that I can't re-enter your body." Icigoneal says the bad news, "So this is the last and final time... we'll ever communicate, my son."
Sueong's head is down by this... until he then tightens his fist and looks up at Icigoneal with a determined/mad expression, "I promise you, Icigoneal, I'll train rigorously to kill Acnologia, one of these days and without rest." He pumps his encased ice fists together and they shatter, "Whatever it takes, I'll freeze him hell of a new one."
"Wow, Sueong..." Hiouis is surprised by his declaration.
Icigoneal grins, and is pleased to hear before advising, "Against that lizard, you'll have to train rigorously to different heights to stand a chance against him. He's the most power dragon in the world."
"You got it." Sueong nods, his fist up and tightens it.
Icigoneal's his whole body starts to glow, "Looks like time now." He looks at himself before saying this, "You've really gotten stronger, Sueong. I watched from inside you when you fought that earth dragon and defeated it." He praises, "You'll definitely surpass me one day."
Sueong smiles determined and swears it.
"I also hope you meet the rest of your fellow dragon slayers." He adds.
"I'll make sure he does." Hiouis salutes, which sueong rolls his eyes.
"If you say so, heh." Sueong replies.
The ice dragon then raises and prepare to depart, same with the other dragon parents, who are also departing and gives their children some final words.
"It was great being with you, Sueong." Icigoneal smiles, his final words.
"Likewise, Father." Sueong nods and smiles back before the dragon disappears away.
After the final farewell:
Sueong turns the other way and starts walking, "Hiouis, once we get back to Catafalco, I'm getting set up right away."
"Where are you heading for training?" The exceed asks.
"Back to 'that' cold area. Where my Ice dragon slaying magic will increase even greater than ever." Sueong replies, "Especially since I'll be staying there for 1 year and 3 days."
"Dang! You're on a mission!" Hiouis is really dramatically surprised.
"Of course. I have no time to waste and the time to go is right." Sueong declares before adding this, "Oh, and while I'm getting set up, go and tell the guild master about what occurred after our mission, plus what I'm about to do."
"Are you sure about that last part?" Hiouis asks.
"Positive." Sueong nods as they continue back to Catafalco city.
In the afternoon at Catafalco City, Sueong gets prepared for his own one-year training and heads out the apartment.
"That should do it." He puts his bag on.
Hiouis comes flying back and says, "Phew. I finished telling the guild master about everything that happened, including you're one year training to defeat Acnologia."
"Did he have any problems?" Sueong asks.
"He doesn't mind, but he does want you to be super cautious." Hiouis replies.
"Perfect." Sueong nods and gets ready.
"Oh, and sense I'll be coming with you of course." Hiouis takes the apartment keys, "I'm getting my things too."
"Heh, well make sure to bring lots of jackets cause you're gonna need it." Sueong advises, smirking a little.
"I was already planning to do that." Hiouis salutes and smirks a little too before doing so.
After Hiouis gets his stuff, they then set out of the Catafalco gate, "It begins..." Sueong thought, "Acnologia will shatter to pieces after I freeze every part of him."