A villainous gambler who has the supernatural power to fix any game of cards or chance. When the players confront him, they discover he also has the power to fix die rolls: THEIR die rolls. He only has 20 hit points but every action you take is a critical fail.
This…sounds suspiciously like Luxord if he were even better at what he was doing.
Look, turning the player into a card or a die every five seconds counts, okay, I can’t do any damage like that.