Cheapest priced copy (Shards of Alara): $0.35 at Card Kingdom, near mint, their price list as of .
Exuberant Firestoker 
Creature — Human Druid Shaman · 1/1 · Uncommon · Shards of Alara · #99
At the beginning of your end step, if you control a creature with power 5 or greater, you may have this creature deal 2 damage to target player or planeswalker.
{T}: Add {C}.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Shards of Alara | 99 | Uncommon | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 1 October 2008The first ability has an “intervening ‘if’ clause.” That means (1) the ability won’t trigger at all unless you control a creature with power 5 or greater as your end step begins, and (2) the ability will do nothing if you don’t control a creature with power 5 or greater by the time it resolves. (It doesn’t have to be the same creature as the one that allowed the ability to trigger.) Power-boosting effects that last “until end of turn” will still be in effect when this kind of ability triggers and resolves. An ability like this will trigger a maximum of once per turn, no matter how many applicable creatures you control.