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 - $36.700
Lightly Played - $29.300
Moderately Played - $25.700
Heavily Played - $22.000
Damaged - $18.400
Near Mint Spanish - $36.700
Lightly Played Spanish - $29.300
Moderately Played Spanish - $25.700
Heavily Played Spanish - $22.000
Damaged Spanish - $18.400