Domestication 
Enchantment — Aura
Enchant creature You control enchanted creature. At the beginning of your end step, if enchanted creature's power is 4 or greater, sacrifice this Aura.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL