Yawgmoth, the Ineffable

+1: Create two black Phyrexian creature tokens with infect and "When this creature dies, target creature gets -1/-1 until end of turn."
-1: Phyrexian creatures you control get +2/+0 until end of turn.
-6: You get am emblem with "At the beginning of your upkeep all nonblack creatures get -3/-3 until end of turn."