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 - $23.200
Lightly Played - $18.500
Moderately Played - $16.200
Heavily Played - $13.900
Damaged - $11.600
Near Mint Spanish - $23.200
Lightly Played Spanish - $18.500
Moderately Played Spanish - $16.200
Heavily Played Spanish - $13.900
Damaged Spanish - $11.600