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.
Near Mint - $34.700
Lightly Played - $27.800
Moderately Played - $24.300
Heavily Played - $20.800
Damaged - $17.400
Near Mint Spanish - $34.700
Lightly Played Spanish - $27.800
Moderately Played Spanish - $24.300
Heavily Played Spanish - $20.800
Damaged Spanish - $17.400