Anivia, the Cryophoenix

Flying
When Anivia, the Cryophoenix dies, create a 0/1
blue Elemental creature token with "At the
beginning of your upkeep, sacrifice this creature
and return target card named Anivia, the Cryophoenix from your graveyard to the
battlefield. It gains haste until end of turn."
Whenever Anivia attacks, it deals 2 damage to
each creature defending player controls.