Protean Hydra enters with X +1/+1 counters on it.If damage would be dealt to Protean Hydra, prevent that damage and remove that many +1/+1 counters from it.Whenever a +1/+1 counter is removed from Protean Hydra, put two +1/+1 counters on it at the beginning of the next end step.
+1: You gain 2 life.−1: Put a +1/+1 counter on each creature you control. Those creatures gain vigilance until end of turn.−6: Create a white Avatar creature token. It has "This creature's power and toughness are each equal to your life total."
Flying, trampleAt the beginning of your upkeep, sacrifice a creature other than Xathrid Demon, then each opponent loses life equal to the sacrificed creature's power. If you can't sacrifice a creature, tap Xathrid Demon and you lose 7 life.
Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)Haste (This creature can attack and as soon as it comes under your control.)At the beginning of the end step, sacrifice this creature.
, Sacrifice Mirror of Fate: Choose up to seven face-up exiled cards you own. Exile all the cards from your library, then put the chosen cards on top of your library.
