Blackwing's Prey

When Blackwing's Prey dies, search your library for up to one target creature with "Blackwing" in their name, reveal them and put them into your hand. Shuffle your library.
Possessed 4 (When this creature enters the battlefield, exile target demon with converted manacost 4 or less from your hand. When this creature dies, you may play that card without paying
it's manacost. The card enters the battlefield tapped.)