Haunting Apparition 
Creature — Spirit
Flying As this creature enters, choose an opponent. Haunting Apparition's power is equal to 1 plus the number of green creature cards in the chosen player's graveyard.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL