Metamorphic Wurm 
Creature — Elephant Wurm
Threshold — This creature gets +4/+4 as long as seven or more cards are in your graveyard.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL
Creature — Elephant Wurm
Threshold — This creature gets +4/+4 as long as seven or more cards are in your graveyard.