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.
