Atlantis Has Fallen, Part 1

Part 1 of the season 4 finale of Nightwing & Batgirl.
== Plot ==
Vulko, Mera, Aqualad, Aquagirl, Nightwing, and Batgirl now accompanied Aquaman to the arena, while Black Manta and his men accompanied Ocean Master. Now, Aquaman and Ocean Master wore their armors, assisted by their companions. But at the last minute, Ocean Master opted to use his own trident for the first round, instead of the Trident of Oblivion. Black Manta noticed and talked to him.
"What's this? Why aren't you using the Oblivion?", Black Manta asked him, infuriated.
"Relax, Manta. I got this. This duel has two rounds anyway.", Ocean Master responded, confident with his old trident.
"Alright. It's up to you. I trust you well.", Black Manta said.
"Once the first round is done, whether I win or lose, it's time for the Oblivion", Ocean Master replied. Now, Ocean Master held his old trident.
Then, they rode their large seahorses for the first round of the duel. The arena was surrounded by Atlantean audiences. Most of the crowd's cheers were for Aquaman, when he was introduced, while for Ocean Master, only a few cheered, and when he was introduced, what was heard was mostly boos. Then, the arena's host announced that there will be two rounds for the duel: the first would be a joust, where the two will battle each other using tridents while riding on seahorses. The second would be a battle of combat. The brothers now agreed to duel each other. The host now officially started the duel. Aquaman and Ocean Master now started battling with their tridents. A few moments later, Aquaman started a conversation.
"Brother, it's not too late to withdraw from the battle. You know that this is all part of his plan right?", Aquaman told Orm.
"Of course, I am completely aware of that. What's the matter?", Orm asked.
"And you still agreed to follow him?", Aquaman asked.
"Of course. Now, stop talking this out and get your head back in the game", Orm answered.
"Don't you realize? He's using you for his own gain. You know him. He cannot be trusted. He always has his personal agenda.", Aquaman said.
"He's given me all the means to help me take you down. He promised me the throne. He promised me together, we will rule Atlantis. Oh, I get it now. You're threatened by him!", Ocean Master said.
"Don't be a fool! I know Black Manta. He can never be trusted.", Aquaman replied.
"The only fool here is you!", Ocean Master told him. 
Now, they continued battling with their tridents. They were both good, but Ocean Master hit Aquaman hard and almost fell off his seahorse. Good thing he was able to maintain balance. Ocean Master stayed aggressive. Aquaman stayed on the defensive. It was a wise thing to do. He just spent the current moments of the match by holding off Ocean Master. While Ocean Master kept pouring his energy, swinging his trident against Aquaman, Aquaman was able to conserve energy. He was able to hold off Ocean Master, who exerted his strength for a long period of time already. Soon, Ocean Master started to feel fatigue, and his attacks weakened. When Aquaman saw him getting weak, he now used this as an opportunity to strike. He now went on the offensive and Ocean Master had no answer to his strikes. Later, the trident was knocked off his hands and he also fell off the large seahorse. Everyone cheered as Aquaman triumphed against Ocean Master in the first round. Mera cheered the loudest. 
"Alright! Still the king! We're winning!", Nightwing, Batgirl, Aqualad, and Aquagirl all cheered.
"No! This can't be!", Ocean Master exclaimed.
The arena host now announced, "And for the first round of the duel, we have a winner! Still on the throne of Atlantis, Aquaman!"
Everyone cheered once again.
Aquaman offered his hand to Ocean Master, but Ocean Master rejected his help and got up on his own. 
Aquaman: It's not yet too late, Orm. We don't have to continue this anymore. Right now, we're just being set up by the Manta. Let's stop this now and take down Black Manta, together.
Ocean Master: You mean surrender? No way I'm gonna do that. We've got so far already. There's no turning back now.
Aquaman: If that's what you wanted, good luck then.
Now, Aquaman and Ocean Master walked to their corners. Vulko told Aquaman he did a good job. He also told him to keep battling the way he did the first round. Calm, collected, and reserved. Aquaman thanked Vulko and told him he would follow his tips. Meanwhile, at Ocean Master's corner, Black Manta now handed him the Trident of Oblivion.
"It's time for oblivion!", Ocean Master said.
"Yes, it is", Black Manta replied. 
Later, the bell rang, which signified the start of the 2nd round. The arena host now went back to announcing. 
"And now, for the 2nd round of the duel for Atlantis! It's time for the death battle! No holds barred, hand to hand combat with only tridents as their weapons. This final round will decide the true ruler of Atlantis!"
The spectators once again cheered.
The bell once again rang, and Aquaman and Ocean Master started the battle. They were both aggressive at first, then Aquaman noticed that he can't easily push off Ocean Master's trident when hitting it. 
"For the last time, I'm telling you, it's not yet too late to withdraw this duel. Cause in the end, no one will win. Both of us will only suffer.", Aquaman said.
"For the last time, I'm telling you, I'm not going to surrender!", Ocean Master replied.
"Can't you really see we are just being manipulated by Black Manta. He just wants us to kill each other so in the end, he can ascend to the throne.", Aquaman responded.
"Once again, I can sense you are threatened. I guess you already feel you're about to lose", Ocean Master answered.
Now, they continued battling. This time, Ocean Master started utilizing the Trident of Oblivion's powers. Aquaman gets electrocuted from every hit he takes. Also, Aquaman felt that the Oblivion is made of hard metal. He felt it while taking hits from it. 
"Hey, that's unfair! Orm's trident! He's cheating", Mera said, as she and the other heroes was about to get down on the arena, but she was blocked by Manta men, who told her no one is allowed to intervene with the duel ongoing.
"Ugh, what is that thing? What's it made of?", Aquaman asked, as he fell to the ground and dropped his trident.
"It's the Trident of Oblivion. Made of chromium, one of the hardest metals in the world. Feels solid once you are hit. Has an advanced electrocution mechanism. And has extremely sharp prongs. Perfect weapon designed especially for killing. And you'll be the first one to fall to it.", Ocean Master answered, pointing the trident on him, and putting his chin up using it.
"Now, get up and fight. I'm not yet done with you", he told Aquaman.
Aquaman did so, picked up his trident, and rose up. But he's starting to feel weak this time. Fatigue starts getting to his body. He tried to attack, but his strikes were already weak, while Orm kept going at him, electrocuting him and giving cuts on his arms and body. Later, after being hit too much, Aquaman fell with his back on the ground. Black Manta now told Ocean Master to finish Aquaman and stab him.
"Brother, is this really what you want?", Aquaman asked Ocean Master, as he felt very weak and can't stand anymore. Orm paused for a moment.
"What are you waiting for? Finish him!", Black Manta told Ocean Master. Everyone was anxious that time. He seemed like he was about to stab Aquaman, but instead he hit the ground with his trident. Now, Ocean Master put his arms up, signifying his victory. 
"He's already down! There's no point in taking his life. I have now claimed the throne of Atlantis!", Ocean Master announced.
"Oh no, you didn't. You just made the job easier for me.", Black Manta, from the corner, said.
"And we have a winner! Your new King of Atlantis, Ocean Master!", the host announced. All the spectators felt fear and terror. But, they were touched when Ocean Master helped his brother get up, and raised both their arms. Everyone cheered for that moment of brotherhood.
"And let's take a look at this heartwarming moment. More than rivals, they are brothers.", the host said.
Black Manta was disappointed and said, "Bullshit! If you wouldn't get the job done, then I will!", as he pointed a harpoon gun at Aquaman. 
Ocean Master and Aquaman were turning around, receiving the crowd's cheers, then Ocean Master noticed the harpoon gun as Black Manta pulled the trigger. Orm quickly shielded Aquaman and the harpoon hit him instead. 
"Brother, no!", Aquaman exclaimed. He was also knocked down as he was hit by Manta men's laser cannons from behind.
Black Manta now went to the middle of the arena and told the crowd, "Everyone, bow down to your new king, the Black Manta!", as he picked up Aquaman's trident.
"Aquaman! No!", Mera yelled. Now, she, Nightwing, Batgirl, Aqualad, Aquagirl, and Nuidis Vulko battled the Manta men but they were outnumbered and soon taken down as well.
Mera went at Black Manta and announced to the crowd, "I am still the Queen. Have no fear, I still have power over this kingdom!"
"Who said I need a queen?", Black Manta said, as he ordered his Manta men to capture Mera.
"No! You can't do this!", Mera said but she was taken down and fell unconscious, so did Nightwing, Batgirl, Aqualad, Aquagirl, and Nuidis Vulko. Everyone in the arena crowd exited and ran for their lives.
Later, when Aquaman and the heroes woke up, they found themselves on a small submarine, deported to the kingdom of the Trench, the unexplored part of Atlantis. Meanwhile, the palace was now under Black Manta's control and the guards are now forced by Black Manta to follow his orders.
The heroes regain consciousness, and were surprised to find they are at the Trench.
"No way! We're with the Trench!", Aquaman exclaimed.
"We gotta get out of here quick!", Aqualad said. 
"Who knows what Black Manta has already been doing in the kingdom!", Nightwing said.
"Mera, let's get out of here and fend off the Trench.", Aquaman told her.
"It's too dangerous!", Batgirl said.
"It's fine we can handle it. All of you, maneuver this submarine. We'll follow your trail.", Mera told the others.
"Got it. Let's just hope the GPS works in this thing.", Batgirl replied.
"Screw it, we're coming with you, King.", Aqualad said.
"Garth! You two, what wee you doing?! Why did you go outside?!", Aquaman exclaimed.
"Trust us, we can help. We didn't spend years training aquatic magic for nothing.", Tula said.
"Let them help, Arthur. Let's trust them.", Mera told Aquaman.
"Alright.", Aquaman now agreed.
Now, they fought and fended off the creatures of the Trench.
Meanwhile Nightwing and Batgirl had a little trouble with the submarine's GPS. They weren't able to patch up signals. 
"This is bad news.", Batgirl said.
"Let's just smash the controls.", Nightwing told her.
"Are you crazy?", Batgirl replied.
"Sometimes all it takes is a little hit in the head.", Nightwing replied.
Nightwing just started pressing everything and smashing the controls, when by chance, they were able to activate the ship's Global Positioning System. 
"It worked!", Batgirl said.
The two of them celebrated. Now, Nightwing quickly maneuvered the sub. 
Aqualad pointed out the sub, and Tula, Aquaman, and Mera now followed its trail while fending off the Trench. Later, they were able to get a good distance away from them. Soon, they were able to locate the kingdom of Atlantis. However, they were surprised at the sight of it.
== Characters ==
=== Heroes: ===
* Dick Grayson/Nightwing
* Barbara Gordon/Batgirl
* Aquaman
* Mera
* Garth/Aqualad
* Tula/Aquagirl
==== Others: ====
* Nuidis Vulko-Aquaman's mentor and staunch ally.
* Atlantean guards
* spectators
=== Villains: ===
* Ocean Master-Aquaman's brother hired by Black Manta to challenge Aquaman for the throne, but later betrayed Manta.
* Black Manta-Aquaman's greatest foe.
* Manta men
*The Trench-an ancient tribe of sea creatures dwelling in the unexplored depths of Atlantis.