An Immortal in the Wizard World

After transmigrating to a wizard world, Ilai discovers that he is actually an immortal being.

Unlimited lifespan, an undying life.

“What? My talent is poor? Then I’ll meditate for ten years, a hundred years, a thousand years. I’ll always meet the requirements for advancement eventually.”

“This skill is very hard? Oh, then I’ll spend decades researching it and see whether it’s really that difficult.”

“Consume vitality to increase mental power? There’s such a good thing?”

“Enemy approaching? Fine, then I’ll find a place to hide for a thousand or ten thousand years. Once his lifespan runs out and his mental power dissipates, I’ll come out again and wander freely through the endless void.”

...

This is the story of an immortal being who keeps a low profile in a wizard world, then ruthlessly crushes endless worlds.