Arenya, Fate Weaver

0: Each player may draw a card. You gain X life and put X loyalty counters onto Arenya, where X is the number of cards drawn this turn.
X: All creatures get -X/-X until end of turn. You lose X life.
-X: Return target creature with mana value X from a graveyard to the battlefield under your control. If X is 8 or more, return all creatures instead