Diabolic Haunting

When Diabolic Haunting enters the battlefield, it becomes an Aura with enchant creature. Search
your library for a card, manifest it, and attach Diabolic Haunting to it. (To manifest a card, put it
onto the battlefield face down as a 2/2 creature. Turn
it face up any time for its mana cost if it’s a creature
card.)
When enchanted creature deals combat damage
to a player, exile it, then you may cast it without
paying its mana cost. Exile Diabolic Haunting.