Dice - Cthulhu 12 Sided Die and Sanity marbles by Steve Jackson Games

The Last Sane Cultist Wins! Cthulhu Dice lets you drive your rivals mad . . . very, very quickly. Players take turns rolling the big, beautiful, custom 12-sided die embossed with tentacles, Elder Signs, and more. Destroy your opponents sanity. Better yet, steal it! But watch out when Cthulhu comes up, he takes sanity from everyone! The last sane cultist wins . . . unless everyone goes mad together. Then Cthulhu wins!