A/N: So my term paper is due tomorrow with a minimum of 8 pages and I currently have a block on that department and still need to write 6 pages. I hope writing this story and therefore focusing on other stuff for a while will help with the block. I am still a noob at writing fighting scenes but I think this will be awesome no matter what just because Cocytus is really awesome.

His head should have flown off with a satisfying 'slurp'. But this did not happen. Instead, she felt the resistance like her scythe had hit a wall. No, not a wall. A wall would have crumbled under the impact of her swing. It had to be either magic or an adversary with superb strength or a martial art like Fortress. When she snapped her head around to see what or who was interrupting her, her mouth dropped wide open. It was extraordinary to get the chance to fight a dragon. But now she looked at something that just seemed outright impossible. An insect holding a battleax in one of four hands stood in front of an oval that looked like it consisted of different kinds of black and exuded power. Just as she saw the gate it disappeared and only left the insect standing. It clicked with its mandibles and exhaled a cloud of white mist.
With a bow, it introduced itself: "My name is Cocytus, guardian of the fifth floor and superior to Valor. My congratulations on overpowering him but I can't accept to muddy our lord's reputation by losing his head and therefore this fight. I will defeat you for the honor of Ainz Ooal Gown.
And you Valor… go back to base and ready yourself for another battle after receiving a heal."
After the black rift in reality had disappeared she still felt a lot of power coming towards her. This lead her to conclude that the enemy in front of her had to be even stronger than the dragon had been. And he had mentioned being the superior to the dragon which would also imply that he is stronger than him. The only drawback was that he was some sort of insect and she did not know if he could propagate with her. But that question would be left for after the fighting was over. This time she did not bother to inform the enemy of her name as she was sure he had watched when she had first introduced himself. After a quick look at him, she had gathered all the information she needed. He wore no armor and had four hands of which only one was carrying a weapon, which looked to be a halberd-type weapon. Under her breath mumbling, she activated two of her martial arts, Flow Acceleration, and Ability Boost. Then she dashed towards the insect's right arm joints as they should be the easiest to hit.
But before her scythe found her target he had already moved back faster than she could realize with a chirping sound. Though she was no expert in the field of interpretation of heteromorphs expressions she could have sworn that the sound was condescending.
Cocytus was annoyed. This girl had shown at least a certain degree of strength, actually, she had shown a level of power that was even respectable in Nazarick, but she was lacking in the manner department. When he saw her fight he had thought about asking his master to incorporate her into his forces. But during the battle and in the brief time they had clashed she had shown her lack of respect and self-awareness, two traits that were really important in warriors.
Therefore he concluded that drawing out the battle was a senseless endeavor and a decisive victory would serve to further to the glory of Ainz Ooal Gown.
Zesshi did not even see the halberd coming down on her. For a second she did not feel the pain. Only after a few seconds had past and the insect warrior had returned to his starting position with a bloodied blade she realized what had happened. He had dashed forward with incredible speed and swiftness and slashed the blade of his halberd over her neck.
In Nazarick
Ainz watched intently. He was curious how Cocytus would do against the strongest being of the New World. And when he struck her Ainz knew it would not sever the head off her shoulders but it would be enough to kill her if she was not healed immediately.
After the battle, Zesshi was brought to Nazarick, healed and locked up in the frozen prison. Neuronist Painkill would soon take care of her. For now, there were others to be cut down. But her information would be valuable for their invasion and Ainz was the last person to ignore the value of information.
On the main battlefield
They tried their best to fight off the undead. But while the Black Scripture started to engage the Death Knights the regular soldiers were dying at an ever-growing rate. After the first shock had worn off they had reorganized a bit better and formed a solid combat line. But even that did not seem to help to hold of the Lizardman with their superior strength and equipment. They would use not only their weapons to cut down soldiers but they would also incorporate their tails in their fighting style and sweep them off their feet while slashing at them.
To be frank it did not look good for them.
But the Black Scripture was not doing better in any capacity. They were thirteen and needed multiple members to take on one of the legendary undead. But there were twenty enemies and they could not let them fall into the back of the soldier's combat line. In their desperation, they tried to capture the attention of the undead by attacking with an area of attack spells. Memento Mori was constantly casting Fireball spells but it was to no avail.
When they realized that the foot soldiers would fall very soon no matter what they did to keep the Death Knights away from them they stopped attacking every one of them and instead reorganized into two attack forces that were targeting one undead at a time.
Time Turbulence knew they were in a lot of trouble. He liked to think about him in a superior way. He was after all one of humanities strongest. But at this moment he was reminded that he was only one of humanities strongest. These enemies were from a realm beyond human. But he and his comrades fought anyways. A retreat would not be possible anymore so the only chance to break out of their precarious situation was by cutting a hole in the enemies encirclement and try to make a run for it disregarding the soldiers as a necessary sacrifice.
And when they all worked together they were able to do something. Memento attacked the undead with a Fireball which Time used to attack simultaneously with Quaiesse, also known as the One Man Army. After successfully delivering a few blows Quaiesse summoned one of his beasts to tank the follow-up hit. After the beast attacked it was slashed once by the legendary undead which was enough to incapacitate the beast.
With this tactic, they managed to wear down their enemy until Time dashed forward, jumped and spun around to decapitate the monster with a final slash. Even that had nearly failed. He had expected to cut like the rotting flesh without resistance but instead, he felt like even the decaying flesh of the undead was stronger than a regular human could have handled. Only by applying all his power and using Limit Breaker, Limit Breaker: Mind, Greater Ability Boost, and Heavy Blow.
Under other circumstances, he would have let out a joyous cry of victory after defeating such a strong fiend. He could have bragged about it and furthered his loved one's regard for him. But in this situation and after using Limit Breaker: Mind he could barely consider this a victory. While delivering his strike and using his martial arts he had felt not only the mental fatigue that came with using so many martial arts at once but also the ripping of his muscles that came as a downside as Limit Breaker: Mind.
At last this victory turned into a total loss when he heard the victorious cries of the Lizardman after defeating the foot soldiers and seeing another five Death Knights approaching them.
Seeing this complete defeat he could not do anything more and just accepted his fate and praying the gods would accept him as a glorious fighter and martyr that gave his life in their service he closed his eyes and waited for the final blow to strike him.
To his surprise, he never felt the weaved blades enter his body. Instead, he felt his hands being bound. When he opened his eyes again he saw that the group led by the captain still tried to offer resistance while the members of his fighting group were all getting similar treatment to his.
In Nazarick
Ainz had to admit that the last stand and the determination of the captain to die fighting was commendable. But then he thought of what they had done to Shalltear, what they had made him do and all respect he had felt towards the warrior died and was replaced by the conviction to make these men and women regret the day they were born.
He got a first jolt of satisfaction when he saw what the Death Knights did to the captain. He had given the order to not kill the members of the Black Scripture. And fulfilling his order the Death Knights had no other chance to subdue him other than cutting off his limbs one by one. First, his right arm, his sword arm, got cut off. But instead of surrendering he picked up his sword and wielded it in the left. To everyone's surprise, he was able to fight that way.
On the battlefield
After it was clear that he would not surrender now the Death Knights took his left arm as well. But like a proper fanatic, this did not stop the captain. With pure hatred in his eyes and foam in and around his mouth shouted out insults and then activated the martial art Physical Boost before charging head-on into one of the undead.
Of course, that had only the effect of knocking out. Finally, he could be brought back as well. And join his comrades who had already been thrown into the frozen prison, awaiting their audience with Neuronist.

A/N: Hope you liked this and wish me luck. After turning in my term paper I will be occupied with my exam phase but it should leave enough time for at least one chapter every week. Sorry for everyone that thought the Cocytus fighting scene might have been too short but I honestly felt like writing a long, drawn-out fight would have been a bad joke at best. Like, come on… Cocytus kills people like Zesshi as a warm-up. Keep in mind that though she is a rather high-level Cocytus is still a higher level and he has good gear and is very highly specialized at melee combat.
Anyways please review and have a great day.

P.S. I have started using a program to check my spelling, so I hope it is not as horrible anymore.