Esper Harem in the Apocalypse

"That's what I am talking about!" he shouted and clapped his hands together loudly.

The wave produced from his clap reverberated through the space itself until far, far away.

Then, Asura's body began to overgrow. And soon after, he had grown as tall as Rudy with six hands and a pure black space body with a few galaxies and stars inside it.

"This is my peak… grand… supreme… my most powerful form. And I have never used it against anyone, not even the gods. So now, either of us will die in this battle."

"Oh? I like it. So we are finally getting serious now, eh?"

Rudy smacked Asura on the head and sent him billions of kilometers away, but at that point, time and speed were a mere factor in their battle.

Rudy and Asura could travel faster than the speed of light, even defying time as though it was a nonexistent factor. However, their existence itself was to defy everything, and that included time too.

Since Rudy's body now consisted of nothing but light and energy, he could change his form at any time. He could turn his lands into legs or even wings.

It didn't take a while for Asura to return, and they both fought.

"You are trying so hard to protect the people you don't even know? Believe me, I wasn't lying when I said I was the same as you. They don't need mercy or gratitude!" Asura shouted while throwing punches at Rudy.

Rudy grabbed his two hands, but Asura had four more hands.

"You seem to misunderstand something. I am not trying to play a hero or anything. I am just doing what I can do."

"You are not fooling anyone with such a lame excuse," Asura commented while smacking his head on Rudy's head.

"Oh, I am not. You yourself said that to get something, you have to do something. While it may entirely line up with what I am trying to say, I am protecting the universe because I have the power to do so.

Obviously, if I was a powerless human, I wouldn't even care about anyone other than my loved ones. I am just doing the job I have been assigned to. The Lord is to rule and protect the universe… or, let's say… reality. And that's what I am doing.

If I let you destroy or interfere with anything, I might lose my powers. What am I going to do then? Sit and watch? Let's be honest, you and I both know that you don't actually need me. You only want my powers."

Rudy shot lasers from his eyes and split Asura's body into two, but he soon regenerated as if nothing had ever happened.

Neither of their attacks worked on the other, and all they did was toss each other far, far away into the space where the light hadn't reached.

CRASH!

Asura crash-landed on a planet made of rings without a globe and glanced around as he couldn't find Rudy anywhere.

"Where did you go?" he asked. "You know it's no fun when someone is hiding."

"Oh, I am not hiding. I am just…" Rudy appeared in front of Asura while putting his hand on his face.

"Hah!" Asura scoffed and said, "Don't tell me you are feeling dizzy already."

"No… I…." Rudy's body grew even more to almost double the size as before. "It's not… stopping"

Asura raised his brow with a curious look on his face and asked, "Wait… you are not doing that on your own will?"

"No. My power has been leaking for a while, and it just keeps getting stronger and stronger."

"Hmm~" Asura hummed in wonder and rubbed his chin with one hand, scratched his forehead and the back side of his head with the two, and scratched both of his cheeks with the two other hands while his last remaining hand moved aimlessly.

"..."

"So you are entering the berserk mode. That's not good." Asura shook his head and said, "You are a void, so you will turn into a black hole and eat everything. Now, you must die."

Asura jumped from the ring planet, titling it a little, and punched Rudy, but it had no effect on Rudy.

Rudy's size increased even more, and Asura was now 1/3rd in size compared to Rudy.

"You are eating up the space and growing stronger!" Asura yelled and made some distance between himself and Rudy.

"The power of the void is indeed formidable, but don't forget the void is powerless against chaos. Your weakness is simple, which is light. I am space! I can easily devour you if I wish to!"

Asura's body was deformed and manifested a shape of a dragon. And it was big enough to cover a universe with just its tail.

"I bet you can't do that! I can change into any being in existence!"

He dashed towards Rudy and opened his mouth to devour Rudy, but Rudy grabbed him by the mouth and squeezed the life out of it.

At the same time, Asura changed his form from a dragon to a whale. After that, he changed into dozens of beings, but none of them could stand a chance against Rudy.

Rudy's body was continuously releasing waves rippling across space. The waves were so powerful and full of energy that they created stars, moons, suns, planets, and even galaxies.

However, the next wave destroyed all of them while creating new ones.

Rudy's existence alone was a threat to every living kind. He could destroy galaxies just by looking at them, and only Asura could fight against him.

Asura changed back to his humanoid form with six hands and stared at Rudy with a resolute expression on his face.

"This is… unbelievable…" he muttered. "You are rapidly growing stronger and stronger. At this rate, you will…"

Asura spread his six hands as tears rolled down his eyes.

"This is the… end, brother. I truly wish that you would be by my side and we would find the first reality together. But… you will have to die before you devour everything. Goodbye… brother. I wish I could have helped you."

Soon, their last and ultimate battle started, but it lasted no longer than either of them had taught.

That night, in the battle, Rudy lost his life and died.