Cheapest priced copy (Lorwyn Eclipsed Commander): $0.49 at Card Kingdom, near mint, their price list as of .
Carnifex Demon 
Creature — Phyrexian Demon · 6/6 · Rare · Scars of Mirrodin · #57
Flying
This creature enters with two -1/-1 counters on it.
{B}, Remove a -1/-1 counter from this creature: Put a -1/-1 counter on each other creature.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.49 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Lorwyn Eclipsed Commander | 72 | Rare | $0.49 | — |
| Scars of Mirrodin | 57 | Rare | $0.69 | $0.79 |
One ruling from Wizards of the Coast
- 1 January 2011As Carnifex Demon's last ability resolves, you'll put a -1/-1 counter on each creature on the battlefield — including creatures you control — except for that Carnifex Demon.