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 - $38.30
Lightly Played - $30.70
Moderately Played - $26.80
Heavily Played - $23.00
Damaged - $19.20
Near Mint Spanish - $38.30
Lightly Played Spanish - $30.70
Moderately Played Spanish - $26.80
Heavily Played Spanish - $23.00
Damaged Spanish - $19.20