Cheapest priced copy (Alliances): $39.99 at Card Kingdom, near mint, their price list as of .
Phyrexian Devourer 
Artifact Creature — Phyrexian Construct · 1/1 · Rare · Alliances · #125
When this creature's power is 7 or greater, sacrifice it.
Exile the top card of your library: Put X +1/+1 counters on this creature, where X is the exiled card's mana value.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $39.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Alliances | 125 | Rare | $39.99 | — |
One ruling from Wizards of the Coast
- 22 September 2011Phyrexian Devourer’s first ability continually checks its power as a state trigger. Once it triggers, it won’t trigger again as long as the ability is on the stack. If the ability is countered and the trigger condition is still true, it will immediately trigger again. If the ability resolves, you’ll have to sacrifice Phyrexian Devourer even if its power has been reduced to 6 or less by then.