Cheapest priced copy (Stronghold): $0.35 at Card Kingdom, near mint, their price list as of .
Mogg Bombers 
Creature — Goblin · 3/4 · Common · Stronghold · #91
When another creature enters, sacrifice this creature and it deals 3 damage to target player or planeswalker.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
1 printing · $0.35 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Stronghold | 91 | Common | $0.35 | — |
3 rulings from Wizards of the Coast
- 4 October 2004The Mogg Bombers do trigger on any creatures that enter at the same time they do.
- 25 January 2011The damage is dealt whether or not you sacrifice the Mogg Bombers. For instance, if Mogg Bombers is destroyed or sacrificed in between the time when the ability triggers and when it resolves, then the targeted player will still be dealt 3 damage.
- 25 January 2011If multiple creatures enter at the same time, the ability triggers once for each of them. You may choose a different target player or planeswalker for each time it triggers.