Cheapest priced copy (Morningtide): $0.35 at Card Kingdom, near mint, their price list as of .
Final-Sting Faerie 
Creature — Faerie Assassin · 2/2 · Common · Morningtide · #63
Flying
When this creature enters, destroy target creature that was dealt damage this turn.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Morningtide | 63 | Common | $0.35 | $0.49 |
2 rulings from Wizards of the Coast
- 1 April 2008The ability cares whether a creature has been dealt damage, not whether it still has damage on it. You can target a creature that was damaged and regenerated.
- 1 April 2008The effect is mandatory. If you control the only creature that’s been dealt damage this turn, you must target that creature.