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 - $7.200
Lightly Played - $5.800
Moderately Played - $5.100
Heavily Played - $4.300
Damaged - $3.600
Near Mint Spanish - $7.200
Lightly Played Spanish - $5.800
Moderately Played Spanish - $5.100
Heavily Played Spanish - $4.300
Damaged Spanish - $3.600