Artifact, 4 (4) {2}: Goblin Cannon deals 1 damage to target creature or player. Sacrifice Goblin Cannon. Goblin cannon crews are known not for their aim but for their ability to dive for cover.
Illus. Doug Chaffee
12/1/2004: You 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.