Majora's Corruption

Enchant creature you control.
Enchanted creature has +3/+3 and menace.
Sacrifice it at the beginning of the next end step.
When a Skull Kid steals Majora's Mask from a traveling mask salesman, the combination of the Skull
Kid's burdened heart and the evil magic within
Majora's Mask transforms the world into the land of Termina.