Vigorspore Wurm

Vigorspore Wurm

Creature - Wurm | Power/Toughness: 6 / 4 (CMC 6)
Undergrowth -- When Vigorspore Wurm enters the battlefield, target creature gains vigilance and gets +X/+X until end of turn, where X is the number of creature cards in your graveyard.
Vigorspore Wurm can't be blocked by more than one creature.