Phyrexian Devourer

If Phyrexian Devourer's power is 7 or greater, bury it. 0: Remove the top card of your library from the game to put a +X/+X counter on Phyrexian Devourer, where X is equal to that card's casting cost. Oracle Text: When Phyrexian Devourer’s power is 7 or greater, sacrifice it. Exile the top card of your library: Put X +1/+1 counters on Phyrexian Devourer, where X is the exiled card’s converted mana cost.