Cheapest priced copy (New Capenna Commander): $0.49 at Card Kingdom, near mint, their price list as of .
Reign of the Pit 
Sorcery · Rare · Starter Commander Decks · #102
Each player sacrifices a creature of their choice. Create an X/X black Demon creature token with flying, where X is the total power of the creatures sacrificed this way.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
3 printings · $0.49 to $2.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Conspiracy | 29 | Rare | $0.59 | $2.49 |
| New Capenna Commander | 258 | Rare | $0.49 | — |
| Starter Commander Decks | 102 | Rare | $0.49 | — |
2 rulings from Wizards of the Coast
- 29 May 2014Use the powers of the creatures as they last existed on the battlefield to determine the value of X, even if they were negative. For example, if the sacrificed creatures were 3/3, 5/5, 0/4, and -2/2, the Demon will be 6/6.
- 29 May 2014You choose which creature you are sacrificing first, then each other player in turn order does the same. The creatures are all sacrificed simultaneously.