Necropolis 
Artifact Creature — Wall
Defender (This creature can't attack.) Exile a creature card from your graveyard: Put X +0/+1 counters on this creature, where X is the exiled card's mana value.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL