Gruncle, Cruel DM

+1: Choose target player, that player roles a d10 and takes 1/2 d10 damage rounded up.
-3: Ask any player if they have a D&D character. If they do, destroy all creatures that share a creature type with that character.
-7: You become the DM, then all players play a subgame of D&D and all players whose characters die in the subgame loose the game.