The afterlife is supposed to be peaceful, but not for Anon! After being resurrected by a Goth loli necromancer and put to work as dungeon fodder Anon grabs his fate by the reigns and overthrows the evil necromancer! He becomes the new master of the dungeon. Using his quick wit and his otherworldly knowledge he must repel aspiring adventurers and heroes from destroying the dungeon core! 

I hate isekai, but I've read it all.