Gloom Ripper [Lorwyn Eclipsed]

Cost: 3 B B When this creature enters, target creature you control gets X/ 0 until end of turn and up to one target creature an opponent controls gets -0/-X until end of turn, where X is the number of Elves you control plus the number of Elf cards in your graveyard. I will not rest until I have excised the rot from this land.