-A few days later-
Madow stands outside of the USJ with the rest of his classmates, Eraser King is explaining to them how All Might won't be able to come today due to the fact that he's teaching at Irohe having been leaked.
"-And so will be moving on without him, just me and AstroNautilus." Eraser King says while they enter the USJ, seeing AstroNautilus waiting for them inside.
A tall figure waves at them, around 2 meters tall, wearing a suit that's a mix between an old diver's suit and a spacesuit and carrying what seems to be a giant anchor. "Hello, class! My name is Neil Kurose, but you can call me AstroNautilus, I'm a hero specializing in rescue and that's exactly what I'll be teaching you today" They then start to explain about the different areas at USJ.
Some students are excited at using their quirks in such an environment, Madow is paying full attention. "So, the first group will be goin- Wait, what is that!?" At the center of the USJ, a cloak made of darkness begins to emerge from thin air.
The cloak expands, inside a face can be seen covered in darkness, "Heroes! Bring me the symbol of peace, or suffer the consequences." The figure says while dozens of villains come out of the cloak. Leviathan immediately starts to pressurize some water.
"T-those are-" Lux says in shock, Erase King responds before she can finish. "Yeah, those are villains. Astro, get the students out. Class dismissed."
"Roger! We'll get back up. Everyone with me!" AstroNautilus runs to the exit with the class. Eraser King jumps down towards the villains, making weapons out of blood and erasing their quirks, taking some of the hastier ones out.
The cloaked figure appears at the door in front of them. "Just where do you think you're going?" He is then hit by a waterjet from Leviathan, doing no damage and just disappearing when making contact. The villains just laughing it off.
"It's a teleportation quirk, those with ranged quirk should attack, the rest fall back." As Leviathan says that, the darkness spreads all around them.
"Everyone stay together no matter what!" AstroNautilus yells at them while throwing the anchor at the villain, imbued with some purplish-dark energy.
"Alex" She doesn't answer, "Alex!" She snaps out of it. "Teleport Max out here, and me to the flood zone, quick." Bifrost nods, her skin starting to look like the night sky, making a large amount of portals, trying to get the class out there.
Leviathan pulls himself towards the flood zone, pushing Max towards the portal leading outside while on the way. The darkness swallows them at the same time as Bifrost's portals. The class is scattered all over USJ.
Leviathan appears inside the flood zone, quickly trying to take the water under his control, but is only able to take a small amount, there's something wrong with the water, it's taking much more effort to use it.
Looking around he can see that there's a boat on top of the water, and Karma and Bifrost were also teleported here. He grabs them with tentacles and jumps out of the water into the boat.
Karma and Bifrost cough up some water, "Thanks, man. Alex, you alright, dude?" Leviathan is taking over more water slowly.
"Well, not really. All those portals really took a lot out of me. But at least we're in Madow's territory." Bifrost says while panting.
"Actually, there seems to be something wrong with the water, like there's some force fighting back against me. And also, villain on our six." Their expressions turn worse and worse with every sentence.
The villain in question looks to be wearing samurai attire and a kasa hat, he has two swords on his hip. He seems to be walking on the water but on closer inspection, he is on a small island that moves forward with every step he takes.
Leviathan makes water tentacles to sling ice spikes at the samurai. "I should really name these attacks." The ice spikes are all cut with a swing of the samurai's sword.
Leviathan makes an expression of shock, then in desperation slings way more spikes at the samurai. "Block these, you jackass!" The man draws his second sword in preparation. Blocking them all with blinding speed.
Leviathan's expression goes back to his normally calm demeanor, as the ice that was being cut turns into water, and grabs the swords. The samurai lets go of them and Leviathan pulls them to the boat. The samurai opens his palm, the wind starts to blow as a glowing symbol appears on his hand.
"Can you two give me a detailed explanation of your quirks real quick?"
"I can absorb the kinetic energy of any movement and throw it back even stronger, I do have a time limit on how long I can hold the energy though." Karma explains.
"I can create portals in my body or around me in a certain area. If I know a place well enough, I can go there regardless of distance." Bifrost takes her turn.
The winds gather around the samurai, forming the shape of a bow and arrow, he shoots it at the boat. But Leviathan is able to make walls of ice between them and blocks the arrow. The island the samurai was on sinks into the water while the walls block their vision.
Leviathan tries to steer the boat towards the shore, but it's then hit by something, making the whole boat shake. From afar something can be seen moving underwater. Leviathan makes a bunch of ice spikes inside the water as a defense.
"Hey Karma, here." Leviathan hands Karma a ball of water that's spinning really fast, Karma quickly understands it and starts to absorb the kinetic energy, making the ball slow down. "While I'm at it, that gave me an idea." Leviathan makes a whirlpool around the boat, making the ice spikes much more deadly.
"Where did he go? Can't you use the water to see?" Karma asks.
"For some reason, not right now." Leviathan makes an ice sphere around their boat and then submerges it completely.
"Hey Madow, you can make drinkable water right?" Bifrost asks.
"Usually, yeah."
"Good, cause I really need some right now" Bifrost opens her mouth, closes her eyes, and puts her hands behind her back, eagerly awaiting.
Leviathan just makes a cup out of ice and fills it with water, handing it over to Karma, she just grabs it from Karma's hands and drinks the whole cup. "You really don't know how to treat a lady."
"Could you focus on the life or death situation, woman?" Leviathan tries to taste some of the water around the boat. It tastes of blood and mud, It's also much bluer and darker.
"Yeah sure, what should I do?"
"Just stay put for a second." Leviathan can only control a 10-meter sphere around the boat. As he looks into the water, two glowing red spheres can be seen roaming around the boat.
Leviathan makes ice blades come out of the sphere surrounding the boat, but with a movement of the creature they just disappear. Glowing red lines flow out of the spheres, revealing the silhouette of the creature, some kind of giant whale monster with red lines around its body.
The creature charges up a massively pressurized ball of water, much stronger than Leviathan is capable of, to the point it starts to glow before shooting out, seeming almost like a laser instead of water.
Leviathan lets his ice sphere crumble, using the force of the water closing to push them out of the way, the boat is shattered into pieces by the attack. Leviathan manages to enclose them in smaller ice bubbles, making some as decoys.
"Bifrost, I'll need some portals on his eyes, Karma, use your energy to launch a strong attack." He hands Karma the swords he stole from the samurai.
"Oh, I never used one of these before. It's going to be so badass." The swords start to glow blue when infused with the kinetic energy.
"Ok, I can do it, but the portals won't last long." Bifrost says, her hands turning starry in preparation.
Leviathan sends massive tentacles out of his area of influence to grab the creature, stopping its movements for a moment, long enough for Bifrost to make the portals. Karma then launches a sword strike into each eye, making them burt in blood, the creature roars in pain.
It starts to shoot water beams wildly while in pain. Leviathan then makes the ice bubbles fly towards the beast, making sure to avoid the beams, especially the one they're in. He then gives Karma another water sphere to absorb the energy.
As soon as they get close to the beast it suddenly stops trashing and turns directly to them, completely ignoring the decoys or the lack of eyes. It then opens its mouth, revealing a massive sphere of pressurized water.
"Karma, punch up, as hard as you can." He quickly obliges, sending a massive punch upwards, giving them enough momentum to barely dodge out of the way of the beam. Leviathan then turns the decoys the beast ignored into ice spikes, piercing it.
The creature stops its glow, no longer being visible, except for Leviathan being able to track the location of the ice spikes. The water around the debris of the boat starts to pick up pieces of metal, sharpening them into makeshift harpoons.
"Hey karma, you quirk got a limit in how much you can absorb?" Leviathan says while trying to follow the beast.
"Uh, yeah. If I absorb too much I might pop a blood vessel or something, and storing too much would make me convulse. And I mean, I'm short-ranged, so not much to do from this far." Karma says, a little nervous.
"Then get ready, cause there is a lot coming." The creature is charging up again. Leviathan makes a shield out of ice and then uses water currents to divert most of the force of the attack, Karma absorbing most of what is left.
"Oh, I so going to have a headache after this, what now? still can't do much from this far." A little blood drips from Karma's nose. The beast starts to glow purple, swimming much faster than it was before.
Leviathan points at Bifrost with his thumb, "Her entire quirk is turning long range into close range. Now Bifrost, give me a portal to that thing's head." He shows her where a whale's brain would be.
Leviathan shoots the harpoons into the creature to once again stop its movements by tying it to the floor of the lake, repeating the same strategy of Karma attacking via portal, but this time the attack is much stronger. The force is strong enough to knock out the beast for a couple of seconds and make its entire body spin forward.
Enraged, the beast starts to swallow large amounts of water, growing in size, and its red glow changes to a white one as it charges directly towards them.
"Hey Bifrost, can you still make portals?" She shakes her head, as she is too tired for now to make another. "Guess will have to turn long range into close range the old-fashioned way huh?"
He makes an ice armor around Karma, and they then leave the ice bubble leaving bifrost to rest. They go towards the beast. "Hey, Karma, going to need you to absorb some of the beam again." Karma looks determined this time.
Leviathan splits them up as the beast opens its mouth to shoot at Karma, but the beam narrowly misses, allowing Karma to extend his hand to absorb its power. Through vibrations in the water, Leviathan had managed to skew the beast's sonar, which is how it was seeing them without eyes.
But what Leviathan didn't expect was that out of the creature's mouth would come an explosive arrow, launched by the samurai. Pulling himself towards the tail beast using the harpoons that are still stuck on it he manages to avoid it, while Karma just absorbs it.
Leviathan makes a thin ice sheet around the beast to grab the next arrows the samurai shoots, the beast tries to headbutt the ice but it just goes through, the ice them close on in its tail, making the arrow it grabbed explode on it, leaving a hole on the sphere as to use the force as propulsion, to spin the beast around, leaving stomach up.
The beast's head after being spun is now turned towards Leviathan, it shoots another beam at him, but its aim is changed when Karma punches it in the stomach at full force, making it curl up at the attack.
Leviathan holds a sphere of pressurized water in his hand, scrapping it against the beam to give it a ridiculous amount of spin, He then slams it at the same point the creature was hit before, finally finishing the creature for good.
The water gets much easier to control now that the beast has lost its influence over it, making it easy to fill the creature with water and down out the samurai, encasing him in ice and bringing him out of the water along with them.
(This one also gets a drawing in the paragraph comment)