Ultraman: I’m the New Reionics

After transmigrating, the protagonist's body collapses and becomes nourishment for his soul. By chance, he fuses with a tiny bit of Reiblood's genes. But during the process, he resists them so fiercely that the genes mutate, changing both his abilities and his species. And so...

A renowned monster-breeding and engineering expert is born.

But right from the start, Reikurondo runs into enormous trouble. On one tiny Earth, more than a hundred evil gods have gathered! One of them is even a gender-swapped Yog-Sothoth!

(Reikurondo: Die, all of you!!)