Cheapest priced copy (Modern Horizons): $0.35 at Card Kingdom, near mint, their price list as of .
Elvish Fury 
Instant · Common · Tempest · #226
Buyback {4} (You may pay an additional {4} as you cast this spell. If you do, put this card into your hand as it resolves.)
Target creature gets +2/+2 until end of turn.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Modern Horizons | 162 | Common | $0.35 | $0.49 |
| The List | MH1-162 | Common | $0.35 | — |
| Tempest | 226 | Common | $0.35 | — |
One ruling from Wizards of the Coast
- 14 June 2019If the target creature is an illegal target by the time Elvish Fury tries to resolve, the spell doesn’t resolve. If its buyback cost was paid, you won’t return it to your hand.