Cheapest priced copy (The List): $0.49 at Card Kingdom, near mint, their price list as of .
Voracious Dragon 
Creature — Dragon · 4/4 · Rare · Conflux · #75
Flying
Devour 1 (As this creature enters, you may sacrifice any number of creatures. It enters with that many +1/+1 counters on it.)
When this creature enters, it deals damage to any target equal to twice the number of Goblins it devoured.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
3 printings · $0.49 to $3.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Conflux | 75 | Rare | $0.79 | $3.99 |
| Duel Decks: Knights vs. Dragons | 56 | Rare | $0.59 | — |
| The List | CON-75 | Rare | $0.49 | — |
2 rulings from Wizards of the Coast
- 1 February 2009"The number of Goblins it devoured" means "The number of Goblins sacrificed as a result of its devour ability as it entered." For each creature that Voracious Dragon devoured, this ability checks its creature type as it last existed on the battlefield to see if it was a Goblin at that time.
- 1 February 2009Voracious Dragon can devour any type of creatures, not just Goblins.