Cemetery Prowler 
Creature — Wolf
Vigilance
Whenever this creature enters or attacks, exile a card from a graveyard.
Spells you cast cost less to cast for each card type they share with cards exiled with this creature.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL