Grand Paladin Tyrux
Empress of Light
0.0001% chance that the Lunar Cultists at the dungeon will be replaced with Dark Cultists. Killing them summons the Night Priestess, when slain the four Pillars of Corruption spawn in the world. Defeating these causes to Cthulhu to spawn, who almost instantly one shots you. So much as seeing Cthulhu permanatly gives the Insane debuff, causing you to gain random debuffs at random times, hallucinate that random enemies are Cthulhu (who will also one shot you), and cause you to randomly attack things automatically, including NPCs.