Cheapest priced copy (Ravnica: City of Guilds): $0.35 at Card Kingdom, near mint, their price list as of .
Goblin Fire Fiend 
Creature — Goblin Berserker · 1/1 · Common · Salvat 2005 · #I5
Haste
This creature must be blocked if able.
{R}: This creature gets +1/+0 until end of turn.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Salvat 2005 | I5 | Common | — | — |
| Ravnica: City of Guilds | 127 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 1 October 2005If Goblin Fire Fiend is attacking, the defending player must assign at least one blocker to it during the declare blockers step if that player controls any creatures that could block Goblin Fire Fiend.