I got pretty experimental with this one. I don't know much about Error404 or Alphatale, but this is the vibe I got from the Wikia description of him. Hope you enjoy.

Art - https://wallpapercave.com/w/wp5942605
YouTube - www.youtube.com/c/darkronaut

Deity Not Found (Error404 Sans Theme)

Mostly Undertale music stuff.

YouTube (Main) - www.youtube.com/c/darkronaut
YouTube (Archive) - www.youtube.com/c/darkronautarchive

I make Murder Drones and Undertale inspired music with a little bit of other stuff on the side sometimes

Deity Not Found (Error404 Sans Theme)

Darkronaut