Creature - Goblin 3/4, 3R (4) When another creature enters the battlefield, sacrifice Mogg Bombers. If you do, it deals 3 damage to target player.1 Behind every great mogg bomber is another mogg with a shovel and a basket.
Illus. Dermot Power
10/4/2004: The Mogg Bombers do trigger on any creatures that enter the battlefield at the same time they do.
10/4/2004: If multiple creatures enters the battlefield as the result of a single spell or ability, then it will trigger multiple times, but due to the errata, only the first resolution will do 3 damage. The other triggers will do nothing.
10/4/2004: The "if you do" only happens if you successfully sacrifice this card. So it still has to be on the battlefield when the trigger resolves in order to deal damage.