The Storyteller

+1: Create a 2/2 d20 token with 'this dice can do anything you want it to, only twice.'
+2: Draw two cards, add two mana, gain two life, mill two cards, play two lands, or put a permanent from your hand into play.
-12: You get an emblem with 'Whenever any player plays a spell you may roll a d20, if higher than ten, you may prevent it. If 20, skip them in turn.'