A-Brine Comber // A-Brinebound Gift (VOW-A-233) - Innistrad: Crimson Vow: (Double Faced Transform)

Whenever this creature enters or becomes the target of an Aura spell, create a 1/1 white Spirit creature token with flying.
Disturb (You may cast this card from your graveyard transformed for its disturb cost.)

Enchant creature
Whenever this Aura enters or enchanted creature becomes the target of an Aura spell, create a 1/1 white Spirit creature token with flying.
If Brinebound Gift would be put into a graveyard from anywhere, exile it instead.