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 - $23.40
Lightly Played - $21.10
Played - $16.40
Heavily Played - $14.10
Damaged - $11.70
Near Mint Non-English - $23.40
Lightly Played Non-English - $21.10
Played Non-English - $16.40
Heavily Played Non-English - $14.10
Damaged Non-English - $11.70