Dreadbringer Raven

Bird Offering (You may cast this card any time you could cast an instant by sacrificing a Bird and paying the difference in mana costs between this and the sacrificed Bird. Mana Costs include color.)
When Dreadbringer Raven enters the battlefield, create a 1/2 blue Bird creature token with flying for each creature that died this turn.
In each of its fallen feathers is the soul of a Wingkin lost.