The Manta's Contract, Part 1

Episode 52 of Nightwing & Batgirl.
== Plot ==
In Black Manta's lair, he is seen talking to Deathstroke on his supercomputer. 
"Black Manta my old friend, what brings you to my service?", Deathstroke asked him. 
"I need your help. I need you to help me take down my greatest opponent-Aquaman. But before that happens, you also have to clear everyone who stands in your way first, which is none other than the whole Justice League.", Black Manta proposed.
"So, you want me to take down the greatest group of superheroes ever assembled? Pretty manageable task", Deathstroke agreed. 
"But there's one thing you must remember.", he added. 
"And what is that?", Black Manta asked. 
"I don't work for others for free", Deathstroke said. 
"I'll pay you in any amount you wish. As long as you get the job done.", Black Manta agreed. 
"Then we have a deal.", Deathstroke replied.
"Agreed", Black Manta said, before ending the call. The scene moves to the Watchtower. Nightwing, Batgirl, and the Justice League core members are at the meeting room, along with the Awesome Threesome. Martian Manhunter faced the Threesome's leader, Torpedoman, and used telepathy on him, since he wouldn't tell who they work for. Moments later, Martian was able to retrieve information from his mind, and found out that Black Manta is their leader. He is the one responsible for letting loose all the threats to Aquaman and his kingdom. 
"Yes, he is the one who's pulled together all these acts. He'll be coming for you! You won't be able to stop him", Torpedoman told them. 
"That's it. We heard enough. Let's dispatch them", Batman said, as he called on Watchtower staffs to pick them up and send them to a chamber. 
"No", the Threesome yelled. 
Aquaman, Nightwing, and Batgirl talked about how things went in Atlantis last night. Aquaman said that the fish were saved from the laughing gas toxins, but the laughing gas contamination of the ocean has affected marine habitats outside Atlantis, causing deaths of little sea plant and animal life. 
"Joker's one crazy bastard.", Nightwing said. 
The scene moves the next day, where trouble was detected by the Watchtower's monitor. An unknown ship near North Atlantic Ocean went berserk and started destroying nearby ships. Mr. Terrific and Martian Manhunter called out some heroes to the villain location. Among the ones mentioned were Nightwing, Batgirl, Aquaman, Mera, Green Arrow, Black Canary, and Metamorpho. They now rode a Javelin and went quickly to the given coordinates at North Atlantic Ocean. Later, they reached the location and landed on the ship. They went down the Javelin and were surprised to see Deathstroke and his commandos. 
"Slade! What are you up to this time?", Nightwing asked. 
"Oh, just an ordinary day, stealing cargo shipments. Heard their values are bigger at the black market these days", Deathstroke said. 
"You better end this now, if you still value your precious life", Black Canary told him, as she used her Canary Cry on him. 
"You just made your worst enemies today, Slade", Green Arrow said. 
Deathstroke was able to withstand the Canary Cry. He now told his commandos to attack them. His commandos are stronger this time and lasted longer against the heroes. Nightwing, Aquaman, and Green Arrow went at Deathstroke and battled him. Deathstroke was able to hold his own against them. Later, after the others were done with the commandos, they helped the three take down Deathstroke. Moments later, they were able to knock Deathstroke down. 
Before going unconscious, Deathstroke had a little talk with Black Manta, who told him, "Pathetic. I thought you were any better than my previous liutenants. Turns out I was wrong." "I got this", Deathstroke responded, as he is already weak. 
"If you can't fight for yourself, fight for your living", Black Manta told him, before Deathstroke fell to unconsciousness. 
Now, the heroes brought him to the Javelin. Upon getting back to the Watchtower, the heroes immediately brought Deathstroke to the founding Leaguers' meeting room. Deathstroke finally woke up, pinned to the wall with metal straps. The League now went to interrogate Deathstroke. J'onn J'onzz tried to read his mind using telepathy, but Deathstroke's mind resisted and it gave J'onn a headache. 
"Don't deny it. We know who you work for now. You work for Black Manta, don't you?", Aquaman asked Deathstroke. 
"Good job figuring out, Justice League. Still won't save you!", Deathstroke replied, as he broke free from the metal straps with his enhanced strength. 
The core Leaguers were surprised Deathstroke was able to break free. Then from his utility belt he pulled out a supersoldier serum, which he injected onto himself which enhanced his strength, speed, durability, and reflexes. He now ran outside the League's meeting room, and used the tracker on his wrist to search where his weapons are brought. His tracker detected his weapons are on a storage room. He then went to the storage room and took down the staff there. Then, he retrieved his weapons. He took down the staff there but Batman pressed the red alert button, which alarmed and put the whole League on notice. All other Leaguers went to the main hall, and Deathstroke was surrounded by all Justice League members. 
"How can you be so sure you could trust Black Manta?", Nightwing asked. 
"Simple. He trusted me with this job. And he gave me the means to do so.", Deathstroke answered. 
Now, Deathstroke took on them one by one, starting with Zatanna, who she punched in the liver so hard she began projectile vomiting. After Zatanna, he fought Flash, who was running around him. Flash tried throwing punches at him, but he was able to dodge them, thanks to his enhanced superspeed from the supersoldier serum. He then went down on his and timed his leg sweep perfectly, knocking Flash down. Next, he just overpowers Batman in combat. Batwoman attacked him next, but she was also taken down easily. 
"You don't realize what you've done. By bringing me here in your floating satellite, you just brought me one step closer to my goal.", Deathstroke told the League. 
Next were Huntress and Green Arrow, who shot arrows at him, but Deathstroke just deflected all of those by spinning his metal pole around in front of him. 
"Now, I can take it from this point.", Deathstroke continued. 
He took both of them down in combat. Next, Green Lantern attacked him with his ring constructs, but the mercenary nullified his attacks using his yellow laser blaster on his wrist, which later hit the lantern. Next, he was ran over by Winged Victory. He rose up and had a swordfight with Shining Knight. He knocks away Shining Knight's sword, and when he was about to draw another sword from his right, he was kicked in the face. He was caught in a tornado by Red Tornado, but his enhanced strength allowed him to later get back down the ground, and tore Red Tornado into pieces with punches. Blue Beetle attacked him next, but he launched a bug onto Beetle's scarab which shut down his system, then he knocked him out. Black Canary used her Canary Cry on him but Deathstroke crossed his arms and was able to resist the Canary Cry until he was able to get a hand on her neck, choked her, and threw her aside. The Atom, in microscopic form was about to head towards him when he swung him away using his metal pole. As a result, she cannot speak magic spells. Elongated Man constricted him but he was able to pull out a blower and used its max temperature, which melted Elongated Man. Next, Hawkman and Hawkgirl attacked him, but he was able to take away Hawkgirl's mace and hit them both hard with it. He fired bullets at Wonder Woman, who was able to deflect it all with her armlets, and when he ran out of bullets, he threw his pistol at the tiara protecting her forehead, knocking her down. He took down Vigilante in hand to hand combat. Next, Superman charged at him and strangled and pinned him to a wall, and Supergirl followed. But he opened his vest to reveal shining kryptonite, which weakened the two. When they were weakened, he knocked them down. Next, Martian Manhunter attacked him but he blasted his heat ray at him weakening him as well. Atom-Smasher looked to pummel him from behind, but Deathstroke was able to outmuscle and stop his pummel, then he punched him in the jaw several times, knocking him out. Plastic Man attacked next but suffered same fate as Elongated Man. Slade knocked down Vibe with one punch. Booster Gold, Fire, Ice, Stargirl, Dr. Light, The Ray, Firestorm, and Captain Atom combined their attacks, but his metal pole just absorbed those energy blasts and bounced right back at the heroes. Wildcat and B'wana Beast were able to knock him down, but he rose up, fought back and knocked the two down even harder. Crimson Fox, Crimson Avenger, and Gypsy followed but they were taken down easily as well. 
"Your big guns are down! What makes you think you remaining ones would be able to stand a chance against me?", Deathstroke said. 
"As long as we can still draw a breath we still got a chance against you!", Steel said, as he, Rocket Red, and Stripe altogether attacked Deathstroke. 
But, Deathstroke took all of them down so hard their suits and armors are destroyed. 
"Pathetic", Deathstroke said. 
"Oh yeah? What about this!", Metamorpho said, hitting Slade from behind. 
When he looked at his other side, Shazam charged at him and was sent away flying. Shazam locked him in his arms, and hit him with thunders consecutive times, but Slade flipped him over, causing him to get hit by his own "Shazam!" thunder. Then, he fought and knocked out Metamorpho. Question shot him with a gun from behind but he was wearing a bulletproof vest which protected him. Deathstroke looked behind, ran at him, strangled him and threw him away to a wall. Orion attacked him with his machine gun but using his explosive discs, Slade destroyed his weapon and knocked him out. Black Lightning attacked next but Deathstroke's pole absorbed his attacks and aimed it right back at him. Aquaman and Mera came to the scene, riding the waves coming from the sewage system from a room they opened. But, Deathstroke hit the water with his pole(induced with Black Lightning's energy). 
"Have no fear, Aquaman is h... AHHHH!",Aquaman said, as he and Mera groaned in pain as they were electrocuted. 
"There's no way we're gonna let you win and escape us", Nightwing said, as he and Batgirl, the last ones standing, battled him. They gave him a hard time, but later, Deathstroke ultimately knocks both of them down. Nightwing sent a distress call to the 7 core Leaguers, but Deathstroke saw it and crushed his communicator underfoot, but Nightwing had relayed it already to them before Deathstroke saw it. The 7 Leaguers made a last push against Deathstroke and combined all their attacks, knocking him down.But once again, Superman weakens as he was exposed to kryptonite when he came in contact too near with Slade. He knocked him out first. Next, he took down Green Lantern, then Flash, then Hawkgirl, then Martian Manhunter. Nightwing and Batgirl rose up and kept fighting despite being already weak, and they were just beaten worst by Deathstroke. Deathstroke knocked out Batman, the last man standing, with a hard uppercut. Now, Deathstroke proceeded to carry Aquaman's unconscious body. "Mission accomplished", Deathstroke told Manta, through a communicator. 
"I can't believe it! You've somehow managed to take down the Justice League single-handedly! I'm lost for words. Nothing beats an assassin who works for a living.", Black Manta replied. 
"I guess you are right.", Deathstroke said. 
"Now head here, and bring Aquaman's body and go receive your payout", Black Manta told him. 
"As you wish, my client.", Deathstroke said. 
Now, bringing Aquaman's body, Deathstroke headed to a Javelin. The last thing Nightwing sees is Deathstroke carrying Aquaman, entering the elevator to the room of Javelins, away from the battle ground at the Watchtower. 
"Slade! We... will... make you... pay...", Nightwing said, before falling unconscious. 
TO BE CONTINUED...
== Characters ==
=== Justice League: ===
* Nightwing 
* Batgirl 
* Aquaman 
* Mera 
* Batman 
* Superman 
* Wonder Woman 
* Flash 
* Green Lantern 
* Hawkgirl 
* Martian Manhunter 
* Mr. Terrific 
* Green Arrow 
* Black Canary 
* Metamorpho 
* Batwoman 
* Huntress 
* Shining Knight 
* Winged Victory 
* Red Tornado 
* Blue Beetle 
* The Atom 
* Zatanna 
* Elongated Man 
* Hawkman 
* Vigilante 
* Supergirl 
* Atom-Smasher 
* Plastic Man 
* Vibe 
* Booster Gold 
* Fire 
* Ice 
* Stargirl 
* Dr. Light 
* The Ray 
* Firestorm 
* Captain Atom 
* Wildcat 
* B'wana Beast 
* Crimson Fox 
* Crimson Avenger 
* Gypsy 
* Steel 
* Rocket Red 
* S.T.R.I.P.E. 
* Shazam 
* Question 
* Orion 
* Black Lightning 
=== Villains: ===
* Slade Wilson/Deathstroke-the Teen Titans' greatest and recurring enemy in the animated series; a mercenary hired by Black Manta to take down the Justice League and deliver Aquaman to him.
* Black Manta
* Deathstroke's commandos
==== Awesome Threesome: ====
* Claw
* Magneto
* Torpedoman