Cheapest priced copy (Shadowmoor): $0.59 at Card Kingdom, near mint, their price list as of .
Deus of Calamity 
Creature — Spirit Avatar · 6/6 · Rare · Shadowmoor · #204
Trample
Whenever this creature deals 6 or more damage to an opponent, destroy target land that player controls.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.59 to $7.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Heroes vs. Monsters | 54 | Rare | $0.69 | — |
| Shadowmoor | 204 | Rare | $0.59 | $7.99 |
2 rulings from Wizards of the Coast
- 1 May 2008This ability triggers from any damage, not just combat damage, that Deus of Calamity deals to an opponent in increments of 6 or more.
- 1 May 2008This ability will trigger when Deus of Calamity deals 6 damage to an opponent at one time. It won’t keep track of the accumulated damage that it deals at different times.