Final Core: Volume 1: Final Core, Book 1

I died and was accidentally reborn as an [angelic monstrosity].

So now I'm building a holy dungeon-tower that is tall enough to reach the gods...so that I can complain about it!

But the humans think that I am trying to destroy the world.

This is the first volume of the Final Core, a dungeon core base-building LitRPG series.