S̷̡̢̙̣̯̲̮̗̳̈̿̌̂̿̀̀i̸̡̩͌͗̉̉͊̊̃̐͆̀n̸̲͉̠͐͋s̵͕̯̳̮̠̰̪͖̹̋̌͛̊̊̾̐̽̕̚ ̷̰͉̘̭̯̫̺͚̅̀͘ͅͅo̴̫͋͐̒̃f̴̡͙̙̰̭͕͎͌͑́́́̄̒̕͝ ̶͖̹̄t̶̤̊͒̄͂̅̄̋͝͠h̶̢͉̣̳̹̰̠̤̃͆̇ͅe̸͈̥͚̺̹̖̞̖͗͠ ̵̢̪̗͇̙̲̰̰͚́Â̶̢͉̦͉̙̟̏̔͑͊͗̌̇̚͜ư̵̰̑̈̀͒́̅͐t̸̟̤̩̲̤̩͖̜̗̲͌̓̀̿͠͠h̸̺̹̬̰̲̞͓͌͛͆̏̈͗̓͘õ̷̝̞͔̘̭̺̥̜̒̈́̂̊̆͘̕ŕ̸̨͈̙̲͈̮̑ ̴͙̫̱͆̄̓Á̷̬̬̹̮͕͕̠͙̤̊̒̒͐̃͗̈͋ͅȑ̶͉̙̲̩̱̀̂c̶̘͚͇̘̠̻̀͌

̵̧̲̝͔͓̝̜͕̰̱̒̕E̶̲̎̄̈́͛̋̕n̸̟̬̗̬͈̝̆ͅv̶͇̭̏̿̈́̋y̵̡̲̟̫͚̑͊̈̈͝͝

In the Evil Capital, Evil smirked as he sat on a throne inside of a meeting room. Among the people regarded as his advisors, Overhaul and All For One sat on one side of the table, while Young Xehanort and Ainz Ooal Gown sat on the other.

"Gentlemen," Evil began. "I daresay that things have been proceeding smoothly." The men that Evil held in high regard each raised an eyebrow and looked at each other for a moment, before looking at Evil.

"With all due respect," Overhaul began. "We haven't actually done anything…"

"Well we have Ainz with us currently," Evil replied. "So I daresay, things are going well."

"Counterargument," Ainz started, holding up a bony finger. "I haven't even contributed much yet. If anything, Albedo, Demiurge, and Shalltear have been slightly detrimental to your efforts considering how they feel you somehow cheated against me in our duel that I knew I wasn't going to win."

"You knew you were going to fail?" All For One asked, intrigued to hear Ainz's confession.

"The Goal of All Life is Death doesn't always instantly kill, even after bypassing most insta-kill resistances," Ainz remarked. "Shalltear survived Cry of the Banshee herself. It was merely a last ditch effort that I had no confidence in when casting. If anything, I used it to show off."

"You could've just surrendered," Evil remarked as he looked at Ainz. "There's no shame in admitting defeat." Coming from Evil, the villains were surprised by his words.

"Well, the Floor Guardians were watching," Ainz replied. "I'd prefer to keep them loyal if I can." Looking at Evil a bit dryly, Ainz added, "Didn't help that it took several hours to calm Albedo and Demiurge down. They were extremely livid."

Evil hummed. "Fair enough."

After a moment, there was a knock on the door to the meeting room, before Nemoto of the Shie Hassaikai opened the door. "Overhaul," Nemoto said with a hum. "I have news regarding the thing you wanted me to investigate on the side."

"Oh shit, that was fast," Overhaul remarked, prompting the curiosity of Evil.

"What were you investigating?" Evil asked.

"Well, when we were active before the heroes showed up and ruined our operation," Nemoto began as he looked at Evil, "a couple of the people we bought women off of suddenly stopped replying. When we were investigating, we saw that the people were all murdered, and the women were taken."

"Before we could investigate further, the heroes struck," Overhaul added. "A lot of our progress with that investigation was lost, but thankfully Nemoto here has a damn good memory. Since you bailed him out of prison, he's been reinvestigating the matter."

"I actually managed to find the assholes responsible," Nemoto said as he placed a file on the table and slid it down to Overhaul. As Overhaul pulled out a photo, Nemoto said, "He goes by Shiv, and has been kidnapping women for the sake of sacrificing them at a shrine."

Evil looked at the photo of the man regarded as Shiv. "Why is his one arm tinier than the other?" Evil questioned, confused.

"That is a good question," Nemoto replied. "But not what I was investigating."

"Thank you Nemoto," Overhaul remarked. "At the very least, we can avenge our dealers."

"Hold on, human trafficking is amongst your crimes?" Ainz asked Overhaul curiously. "Why?"

"We needed women to test our Anti-Coochie Drug," Overhaul explained. "The only way to get 'subjects' was through the Black Market."

Ainz blinked. "What?!"

"Long story," Overhaul replied.

"In any case," Evil began as he yoinked the file from Overhaul. "I'm going to go deal with this myself."

"Huh?" Overhaul questioned as everyone in the room looked at Evil, confused and surprised.

"Ainz, Xehanort, you're with me," Evil said as he stood up from his throne and began walking out of the room.

Xehanort and Ainz looked at each other for a second. "He's not serious, is he?" Ainz asked.

"He was serious," Xehanort muttered as he, Ainz, and Evil fought a group of bandits and psychos at a seaside temple that was old in terms of appearance, with a statue of a man inside of the temple. All around the temple, there were puddles of blood, both old and new.

"KILL THEM ALL! LET THEIR BLOOD BE A SACRIFICE TO THE GREAT LEVIATHAN!" Shiv shouted, having one extremely lanky arm and one tiny baby sized arm.

"Where are the victims?!" Evil shouted at the psycho as he killed the lesser grunts.

"THEIR BLOOD WAS DRAINED IN THE NAME OF OUR HOLY LIGHT AND BEACON WHO WILL LEAD US TO A BLOODY WAR IN VALHALLA!" Shiv shouted loudly and obnoxiously.

"Shouldn't you be trying to find the Vanir or the Aesir?" Ainz questioned as he took down several of the weak bandits and psychos that attacked him.

"THE FUCK ARE THOSE?" Shiv shouted.

As the fighting continued, with Evil, Ainz, and Young Xehanort easily fighting the weak and not very skilled bandits, the ground shook suddenly and the sea suddenly became still. "Why is the sea still?" Xehanort questioned.

"THE HOUR HAS COME!" Shiv shouted as he pulled out a book and began reading incantations off of it.

"Ainz, what is he saying?" Evil asked Ainz. "You speak magic!"

"That is not wrong and very wrong," Ainz stated, before the sea suddenly turned a bloody red. "Uh…"

Evil was alarmed and confused. "What's happening?" Before they knew it, a hurricane began forming, prompting Evil and Ainz to form a barrier to protect them and Xehanort. As the blood red hurricane swept through. As the blood in the temple was absorbed into the hurricane, Shiv continued his crazed chanting whilst several of the bandits' throats were slit and the blood drained from their bodies.

"Someone tell me what is going on?!" Xehanort shouted, actually panicking considering how sudden this was all happening.

"I don't know, but I'm not concerned!" Evil shouted boldly.

As the hurricane calmed down, the blood within its winds suddenly morphed into that of a sea serpent that circled the entire temple area. "State your reasons for summoning me," a voice boomed from the blood serpent, though it sounded somewhat tired.

"REJOICE MEN! FOR WE HAVE SUMMONED THE GREAT LEVIATHAN!" Shiv shouted at the remaining bandits and psychos who shouted in cheer, with some shooting into the air in reverence of the serpent identified as the Leviathan appearing. "YOUR SEPERNTLINESS, WE HAVE SUMMONED YOU TO LEAD US TO ETERNAL GLORY AND A FIGHT UNLIKE ANYTHING WE'VE EVER SEEN!"

"Stop with the shouting," Leviathan hissed in annoyance.

"MEN, SHOUT IN REVERENCE!" Shiv shouted, ignoring what Leviathan said. The blood serpent seemed annoyed by this, before suddenly the blood serpent's form began to condense into a humanoid form.

To almost everyone's surprise, the humanoid form of the Leviathan stood about 9 feet tall, with dark skin and white markings along his arm and torso, with a sun marking on his abdomen. His dreads were tied back in a ponytail, with one half of the dreads being a light blue, with the other half being black.

Adorned with several bracelets and cuffs along his body, he had 2 of the gold rimmed and red patterned bracelets on his left arm, one on his right arm by his wrist, two around his ankles at the bottom of his grey and dark grey striped pants. There was a similar red pattern at his waistband, along with a black coat. Otherwise, the man was barefoot and wore no shirt.

"Wow, he's fit," Evil remarked, surprised.

"And tall…" Xehanort remarked. "Why is he so tall?"

"YOU GRACE US WITH YOUR PRESENCE!" Shiv shouted, before his head was smacked swiftly by Leviathan, causing Shiv's body to fall to the ground lifeless due to the gory mess that came from Shiv's head.

"What did I say?" Leviathan grumbled. Before anyone could process what happened, the rest of the bandits and psychos were suddenly killed as their heads were slammed into the ground, or ripped off their bodies. Leviathan growled in frustration. "Ugh, gross…" He wiped the blood off of his hands on Shiv's body.

Whilst Ainz and Xehanort were gawking, Evil was impressed. "You're fast," Evil remarked as he lowered the barrier and stepped forwards towards Leviathan.

Leviathan turned to look at Evil. "You want to die too?" Leviathan asked as he looked down at Evil, before looking at Ainz and Xehanort.

"As if I, Evil, can die," Evil remarked, before Leviathan smacked Evil in the head, and sent him flying into the temple.

Leviathan let out a hum of acknowledgement. "I had to use a bit of force there," Leviathan remarked, his hand soaked in Evil's blood. Leviathan shrugged and merely shook off the blood, before turning to look at Xehanort and Ainz. "So… what about you two?"

Ainz had to consider this for a moment. "Well… Time Stop!" Ainz suddenly stopped time using his magic, and looked at Xehanort and grabbed him. "Well, now I can hopefully make my escape and save Xehanort in the process."

"Ah ah ah…" Leviathan's voice sang, causing Ainz to see Leviathan moving whilst time was stopped, and wagging his finger. "Bold, but probably not gonna happen."

As Ainz resumed time, he shouted, "Fuck!"

"Why are you touching me?" Xehanort questioned, surprised by the fact Ainz was suddenly holding him, prompting Ainz to let go of him.

"Unfortunately, we're in a pickle," Ainz said to Xehanort. "This being is capable of moving whilst time is stopped."

"WHAT?!" Xehanort shouted in fright.

Ainz looked at Leviathan intently, whilst Leviathan gave a grin, showcasing his razor sharp teeth. "Just who are you?" Ainz asked Leviathan.

"I am the Leviathan," the tall man said as he rubbed one of his eyes, letting out an audible yawn. "I am a Primordial being of the sea, and a King of Hell."

"By the name of Enma, we are fucked," Ainz remarked.

"I also go by many other names," Leviathan added. "But, that's neither here nor-" Suddenly, Leviathan staggered a bit, having taken a blast from behind.

A laugh was heard, and Ainz and Xehanort looked past Leviathan to see that Evil was still alive, his head having regenerated after being torn apart. "How'd you like that backshot?!" Evil shouted.

"Woah!" Xehanort shouted, surprised by Evil's poor choice of words.

"OOOOOOOOOOOOOOOOOOOOOOHHHHHHHOOOOOOOOOOOOOOOOOOOOO!" Came two loud sensual moans from off in the distance.

"I do not swing that way," Leviathan snapped, a bit annoyed by Evil's choice of words.

"Swing what way?" Evil asked, genuinely confused as he looked at Leviathan.

"I-" Leviathan blinked, actually baffled. "You said backshot!"

"Yeah, cuz I shot you in the back with a Ki Blast!" Evil replied. "That's a backshot!"

"Poor choice of words," Leviathan stated with a deadpan expression.

"Xehanort, what is the Great Leviathan referring to?!" Evil shouted.

"You came off as sexual!" Xehanort answered. "Backshots are- no, wait, why am I explaining this to you now?!"

"Whatever," Evil said as he pointed at Leviathan. "I know of the threat you pose Leviathan-!"

"So you should know you're outmatched," Leviathan remarked, a bit confused and curious as to how this fool was calmly standing next to him.

"-and I know exactly how to defeat you!" Evil declared.

"Pfft, yeah right," Leviathan said, looking at Evil like he was delusional, before watching Evil pull out a Yu-Gi-Oh Duel Disk.

"It's time to duel!" Evil shouted.

As Leviathan stared at Evil dumbfounded and confused, Ainz looked at Evil. "What are you doing?" Ainz asked, confused.

"Isn't it obvious? He's the Great Leviathan," Evil said. "Yugi and Kaiba defeated Dartz with the power of Duel Monsters, so now in order to defeat him, we have to win by beating him in a duel! That way-"

"What are you going on about?!" Leviathan questioned. "Seriously, what the hell is a Duel Monsters?!"

"Forgive him, he's a bit misguided," Ainz said to Leviathan. "I'm sure if we talked this out-"

"I'm sorry, are you his subordinates?" Leviathan asked Ainz and Xehanort.

"...we follow him, yes," Xehanort answered.

Leviathan growled, displeased with this turn of events. "So you're telling me that this brat is your leader?! Preposterous!"

"Well he did beat ME in a fight," Ainz replied.

"And I had nowhere else to go," Xehanort added.

"Regardless, you two should be ashamed that this idiot of a child is your leader!" Leviathan shouted as he glared at Ainz and Xehanort.

"Big words," Evil shouted as he looked at Leviathan. "I'll let you know I fought to get to where I am now!"

"Clearly, that's all you are," Leviathan remarked as he turned to look back at Evil. "Seriously, hit the books! Your group or whatever you lead is bound to fall if you're the leader and you continue to have zero brains!"

"He proclaims that he rules the world," Ainz informed, catching Leviathan by surprise.

"He proclaims what?!" Leviathan questioned, before Evil lunged at Leviathan and punched him in the face, sending him flying into the bloody ocean.

"Alright, fine, I'm not dueling him," Evil said. "Xehanort, hold my Duel Disk!" Evil shouted as he tossed Xehanort the Duel Disk, before flying after Leviathan in the bloody ocean.

Leviathan was skidding across the top of the waves before recovering and sliding on top of the ocean's surface, standing on top of the water. "What a cheap shot…" As Evil flew at him, Leviathan stared at the demon before popping a neck muscle. "I guess this is a…" He put a hand to his mouth and yawned. "...way to wake up."

Evil threw a punch as he got close to Leviathan, with Leviathan catching his fist. As the fighting began, Evil threw punches and kicks wherever he could in an attempt to overwhelm Leviathan with his speed. However, Leviathan merely deflected his advances and side stepped his attacks.

The Demon God was slowly beginning to realize that he wasn't making Leviathan try. In fact, Leviathan still looked rather tired. Evil growled in frustration as he lashed out, an explosion erupting from the palm of his hand. "Come on, attack me!" Evil shouted at Leviathan. "Fight back already! This is a battle!"

Leviathan gave Evil a lazy glare. "And why should I spare even a little effort squashing you like the bug you are?"

"Well your efforts failed last time, so I'd like to see you try!" Evil proclaimed boldly as he gathered energy in the palms of his hands and fired a black and red beam forward. "EVIL KAMEHAMEHA!"

Leviathan merely rolled his eyes as lifted his foot and smacked the Ki Blast down below into the ocean. An explosion occurred and the sea rocked. Evil was caught slightly off guard by Leviathan's use of his feet versus his hands to deflect the Ki Blast. Leviathan looked at Evil, unamused. "Really, you put your name into the attack?"

"It's fitting!" Evil argued. "Because it's an evil version of the Kamehameha!"

Leviathan stared at Evil, simply confused and baffled by what he has to deal with after having woken up. "I'm sorry, but who named you Evil?!"

"I did!" Evil shouted as he fired several Ki Blasts from his hands rapidly. "I chose it to replace my previous name!"

"Wow." Evil suddenly felt a fist get shoved into his abdomen as Leviathan appeared before him in an instant. "You also have terrible choices in names." A swift axe kick led to the water in the bloody ocean parting instantly as a large clearing was opened as Evil struck the ocean floor, laying lifeless for the moment…

Leviathan watched as the blood began falling on top of Evil, the waves of the sea crashing as it filled up the spot where it had rapidly parted. "Well, that's done," Leviathan said as he began to look over to shore where the temple of his was. "Now, let's go check in on-" Leviathan was cut off by an orange glow coming from the depths below, prompting him to look down. "Hmm?"

The sea once again split, and from the ocean of blood Evil rose from the depths, flying high into the air as an orange aura surrounded him, before he flexed and shouted at the top of his lungs. There was a small power surge, and Evil stared down at Leviathan with orange glowing hair, with crimson red eyes.

"Alright," Evil began. "Let's see how you fare against a Super Saiyan."

"Not impressive," Leviathan remarked as he stared at Evil, rubbing his eye a bit.

Meanwhile, back on land, Xehanort and Ainz were staring out at the ocean, trying to watch the fight between Evil and Leviathan.

"Alright, so how is it looking?" Xehanort asked Ainz. "I can't see a damn thing. They're so fast…"

"I can see just fine," Ainz replied as he looked over at Xehanort. "Although Evil is declaring he is a Super Saiyan… which doesn't add up considering Super Saiyan should be golden, not orange."

Xehanort looked up at the red sky. "Well, perhaps the lighting has something to do with it," Xehanort suggested.

Ainz paused as he thought about it, bringing a hand to his chin and rubbing it in thought. "...yeah, I'll take that as an answer."

Back to Evil and Leviathan, Evil smiled as he attacked Leviathan once more. Although he was fast, Leviathan was still able to keep up, and he even seemed to be unbothered by Evil's speed.

"Boy, you're literally just throwing the same attacks at me," Leviathan remarked as he tossed a feint at Evil aimed at Evil's head. As Evil bought the bait, Leviathan brought his knee up and jammed it into Evil's abdomen before kicking him away. "Are you suicidal?"

"Why would I want to die?" Evil questioned as he massaged his gut, staring at Leviathan intently, as if looking for openings or weaknesses.

Leviathan merely blinked at Evil's stupidity. "You have yet to land a significant blow with your flailing about. Furthermore, it should be clear that I am much faster and stronger than you, especially since I haven't been taking this seriously."

"Well then take it seriously!" Evil shouted as he held up his hand and shouted, "BIG BANG ATTACK!" A red ball of energy gathered in front of his hand and fired forward. Leviathan dodged by slipping into the sea of blood, the blast missing and just going out to sea before harmlessly detonating.

Evil looked around for Leviathan, noting his disappearance. "Where did you go?!" Evil shouted, before watching a large serpent come from the sea of blood. The serpent was Leviathan, who glared down at Evil with his piercing gaze.

"Please boy, you're not worth my time," Leviathan remarked as he glared down at Evil, before lazily shooting out random blasts of energy from his mouth at Evil.
Evil dodged the attacks that were purposely not even properly aimed, before conjuring a white ball of energy in his hand. "Well, two can play at that game!" Evil shouted, before throwing the ball into the air.

Leviathan was a bit thrown off by the ball that missed him by a mile. "...you know I'm over here, right?"

"BURST OPEN AND MIX!" Evil shouted as he looked at the ball, before it grew in size and glowed ominously.

Leviathan peered down at Evil and then the ball. "I'm sorry, is that supposed to do something?"

After a moment, Leviathan then watched as Evil began growing in size, suddenly becoming ape-like as Evil transformed into a Golden Great Ape. Evil laughed and looked at Leviathan. "Monkey see monkey do! Monkey does the same as you!" Evil shouted, pointing at Leviathan. Leviathan merely opened his mouth in response, firing a blast at the artificial moon. "H-Huh?" Evil then rapidly returned to human form. "HUH?!"

Ainz let out a whistle. "Did not expect that."

"Your antics bore me brat," Leviathan stated as he stared down at Evil, looking incredibly bored and still half-asleep.

"Hey, that's not how this works!" Evil shouted at Leviathan. "I was supposed to turn into a Great Ape and then fight you! That's how this should've went!"

Leviathan felt his eyes twitch in mild annoyance. "You are not seriously complaining in the middle of a fight…"

"But it would've been cool!" Evil replied, before Leviathan slammed him with his tail, sending Evil flying back to land and leaving a crater behind Ainz and Xehanort, who were nearly blown back by Evil flying right past them.

"Oh my god!" Xehanort shouted, panicked as he looked back at Evil, covered under the rumble of what was Leviathan's temple.

Leviathan loomed over Xehanort and Ainz now, glaring down at them. They were but ants compared to the mighty serpent that had been fighting Evil for the past minute or so. "Now then, what to do with you fools…"

Xehanort got on guard, lifting his keyblade up slightly, while Ainz merely looked up at Leviathan. "Lower your blade Xehanort," Ainz said, catching Xehanort off guard.

"What?!" Xehanort questioned. "But-"

"We both know it'd be futile," Ainz replied. "But I still hope we can negotiate."

"Negotiate?" Leviathan questioned, peering down at them with a hint of interest in his eyes. "What makes you think that possible?"

"Well, you seem like a reasonable person," Ainz answered. "And considering the fact you haven't killed us yet is the only evidence I have of that."

Leviathan let out a low hum. "...what do you propose?"

"Well," Ainz began, "assuming Evil is alive, perhaps you could… lend us your knowledge?" Upon seeing Leviathan even remotely consider it, Ainz continued. "He is but a child. That is no excuse but that in part should be due to his upbringing. If we could have your guidance… perhaps we could help curb this lack of intelligence and even so much as make him a more… normal person in terms of intelligence and common sense."

"And why should I?" Leviathan questioned.

"You were summoned, and while those previous fools who summoned you were idiots, we are at least more reasonable," Ainz argued calmly. "We might have nothing to offer you, but your assistance could make all the difference in turning the manchild behind us into a real man, someone who could do much... ugh... evil..."

Leviathan gave a low hum once more. It was clear he was taking this into consideration. Ainz was actually quite nervous as he waited for a response and wondered if he'd have enough time to return to the Great Tomb of Nazarick since he saw how fast and destructive Leviathan was.

But after a moment, Leviathan returned to his human form, and looked at Ainz and Xehanort with his arms crossed. "...I'll give you a month. Simple as that and I'll see if that is enough time to prove to me or rather give me a reason to help your charity cause." Leviathan let out a yawn. "I'm almost awake already, so might as well stay up for a bit."

"Deal," Ainz said, before the rubble behind him that was once Leviathan's temple suddenly exploded, and Evil stood up from the debris.
"I have resurfaced!" Evil declared proudly, covered in dust and small patches of blood despite no longer bleeding.

"Yo, he's on our side now," Xehanort called out to Evil, surprising the self-proclaimed Demon God.

"What?" Evil questioned.

"Your advisor here actually knows somewhat how to negotiate," Leviathan replied as he looked at Evil with an uninterested gaze. "I'm willing to… hear you out for a month. Afterwards… all bets are off."

Evil hummed. "...so you're a part of my army…"

"He's an advisor," Ainz said. "Not a fighter."

Evil shrugged. "Whatever…" Evil resumed his fighting stance. "Now then, let us resume our battle!"

Leviathan blinked in bafflement. "...I'm sorry, I'm still half asleep, what?"

Ainz groaned and held a hand to his face. "This is going to be a LONG month…"

I'm amazed I can actually write chapters ahead of time so I can have prepped chapters. It's amazing.

Couple of things: This is a collab, meaning that Leviathan is an OC from my friend Rai's original story. He's also a multifandom OC, but this is the version of him from her main story.

We'll get (more like I'll give) more information on him as time goes on, but for now, I wish to end the chapter here. Stay tuned for more!

Crossover Credits:

Leviathan (Euphory.a, Instagram)