Chromatic Chameleon

Chromatic Chameleon's color is every color and no color. As Chromatic Chameleon enters the battlefield, roll a twelve-sided die. Chromatic Chameleon enters the battlefield with a number of +1/+1 counters on it equal to the result. Whenever Chromatic Chameleon deals damage to a player, you may reveal a card from outside the game and transform Chromatic Chameleon. (You can't actually reveal cards from outside the game.)