Phyrexian Devourer [Alliances]

Set: Alliances Type: Artifact Creature — Construct Rarity: Rare Cost: {6} 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.