Honkai: Star Rail: Cage of Imaginary Numbers

A sudden accident hurls him from the familiar world into the cosmos. He had hoped to make a place for himself among the stars using his advanced knowledge, but instead he builds a mechanical deity beyond his wildest imagination. It can tear apart reality and illusion, yet no longer obeys any creator's commands, becoming an unknown threat hanging over the cosmos.

When the roar of machinery shatters the stars and the deity's gaze fixes on its creator, he realizes he has opened Pandora's box. Flight is his only option. He abandons the star charts he knows, boards his battered starship, and races toward more distant, more chaotic regions of the unknown.

Wandering between countless bizarre worlds, he searches for a way to control or destroy the deity, unaware that with every step forward, the shadow of the imaginary number quietly tracks him. Is this flight across the cosmos the beginning of salvation, or a path into an even deeper prison?

The less serious version:

My name is Zandar. I created a mechanical deity, but it turned out to be a rebellious little thing, so now I'm going to give it a proper childhood.