Cheapest priced copy (Duel Decks: Sorin vs. Tibalt): $0.35 at Card Kingdom, near mint, their price list as of .
Ashmouth Hound 
Creature — Elemental Dog · 2/1 · Common · Duel Decks: Sorin vs. Tibalt · #45
Whenever this creature blocks or becomes blocked by a creature, this creature deals 1 damage to that creature.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duel Decks: Sorin vs. Tibalt | 45 | Common | $0.35 | — |
| Innistrad | 128 | Common | $0.35 | $0.49 |
| Jumpstart | 290 | Common | $0.35 | — |
One ruling from Wizards of the Coast
- 22 September 2011Ashmouth Hound’s ability triggers once for each creature it blocks or becomes blocked by.