Clutch of Undeath 
Enchantment — Aura
Enchant creature Enchanted creature gets +3/+3 as long as it's a Zombie. Otherwise, it gets -3/-3.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL
Enchantment — Aura
Enchant creature Enchanted creature gets +3/+3 as long as it's a Zombie. Otherwise, it gets -3/-3.