Anivia, the Cryophoenix

Flying
When Anivia dies, create a 0/2 blue Phoenix Egg creature token with "At the beginning of your
upkeep exile Phoenix Egg, return Anivia to the battlefield. It gains haste until the end of turn."
{w}{u}:Anivia deals 1 damage to target creature.
Tap it.
{2}{u}:Create a 0/4 blue Ice Wall creature token
with defender and "At the beginning of
the end step exile Ice Wall."