Anivia, the Cryophoenix

Flying, trample, haste

Death — If Anivia, the Cryophoenix would die,
instead exile it with three egg counters on it.

Rebirth — At the beginning of your upkeep, if
Anivia, the Cryophoenix is exiled with an egg
counter on it, remove an egg counter from it. Then
if Anivia, the Cryophoenix has no egg counters on
it, return it to the battlefield.