You may cast this spell as though it had flash. If you cast it any time a sorcery couldn't have been cast, the controller of the permanent it becomes sacrifices it at the beginning of the next cleanup step.
Enchant creature
As this Aura enters, choose a color.
Enchanted creature has protection from the chosen color. This effect doesn't remove this Aura.
The sacrifice occurs only if you cast it using its own ability. If you cast it using some other effect (for example, if another effect allowed you to cast it as though it had flash), then it won't be sacrificed.