Spooky Foot

+2: Create four 10/10 phyrexian foot creature tokens with flying, menace, lifelink, haste, trample, vigilance, first strike, and double strike.
-1: Add 30 mana in any combination of colors. You may open up to 6 sealed MTG set boosters and cast their contents this turn.
-12: You get an emblem with, "Creatures you control have indestructible, hexproof, and annihilator X, where X is the number of feet you control.