Cheapest priced copy (Fifth Dawn): $0.35 at Card Kingdom, near mint, their price list as of .
Goblin Cannon 
Artifact · Uncommon · Fifth Dawn · #125
{2}: This artifact deals 1 damage to any target. Sacrifice this artifact.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.35 to $4.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Fifth Dawn | 125 | Uncommon | $0.35 | $4.99 |
One ruling from Wizards of the Coast
- 1 December 2004You can activate Goblin Cannon's ability multiple times in response to the first activation. Goblin Cannon will be sacrificed the first time the ability resolves, but each activation still deals damage when it resolves.