Hello, sorry that you had to wait so long, my tablet was temporarily removed from my possession, but I have it back now! 😀 Without further ado, into the story!
As Oltrogus ran though the ravaged street, he noticed that multiple civilians had been crushed or impaled, with others getting major or minor injuries. Then he noticed that the hero crust was laying on the ground. He rushed over to him and checked his pulse. Still breathing. With that, he ran off, continuing to chase after the leviathan, until he found it in the centre of the city, where it was trying, and failing, to hit Endeavour. Before Endeavour could move in to strike, he was slapped out of the sky by the tip of the leviathan's tail, sending him hurtling through several buildings. Oltrogus made his move.
He had been expecting for this new serpent villain to be a difficult fight he could win, not one where he loses and almost die! Endeavour could already tell that the place he had been hit by their tail was bleeding, he could feel blood on his skin. It would definitely scar. He slowly got up. Everything hurt. He knew it would be suicide if he returned to the battlefield, but he was the new no. 1 hero, he had to stop this villain, no matter the cost. If he died, then so be it. He didn't mind, just as long as Shoto took his place once he graduated U.A.
Yeah, you can probably guess what Endeavour is going to find when he gets back, but wouldn't it be better to read about it instead of guessing?
"Oi! Over here ya stupid serpent!"
Shouted Oltrogus as he waved his arms about, attracting the attention of the leviathan. The leviathan let out a low hiss, but due to it's massive size, the sound shattered every window within a 20 block radius. Then, the Leviathan charged forwards, and Oltrogus leapt upwards. The leviathan's charge caused it to easily destroy the skyscraper, with Oltrogus landing on it's back. He then lifted his axe, and, GRAND SLASH. The resulting slash tore clean through the Leviathan, slicing it's heart in half in the process. Blood waterfalled out of the Leviathan's mouth. Blood streamed out of the massive hole in it's body created by Oltrogus' attack, and quickly, it was dead. Oltrogus carefully climbed down, and when he reached the bottom, he noticed that Endeavour had made his way back, and he was currently staring in disbelief at the gigantic beast, that layed dead behind Oltrogus.
The first thing Endeavour noticed when he got back was the dead carcass of the villain that had been running amok just a few seconds ago, and right in front of it was U.A's heroics teacher, with an axe on his shoulder. He knew he wasn't going to mess with him.
Sorry this is so short, I just didn't really have that many ideas for the fight. Please don't hurt me.