Cheapest priced copy (Fifth Dawn): $5.99 at Card Kingdom, near mint, their price list as of .
Desecration Elemental 
Creature — Elemental · 8/8 · Rare · Fifth Dawn · #45
Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)
Whenever a player casts a spell, sacrifice a creature.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $5.99 to $16.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Fifth Dawn | 45 | Rare | $5.99 | $16.99 |
2 rulings from Wizards of the Coast
- 1 December 2004If Desecration Elemental is the only creature you control when its triggered ability resolves, you’ll have to sacrifice it.
- 1 December 2004This ability triggers off anyone casting a spell, including you, not just Desecration Elemental’s controller or an opponent.