Matt, the Rabid One

+1: You may cast Green or Black Instants as though they had Flash.
-2: Choose a color of mana that you do not run in the deck containing Matt, the Rabid One. Until end of turn, add 1 mana of that color to your pool.
-8: Open an unopened MtG booster pack. If the rare card is a Golgari, you win the game. Otherwise, attempt to sell the card to target opponent.