Cheapest priced copy (Avacyn Restored): $0.35 at Card Kingdom, near mint, their price list as of .
Zealous Strike 
Instant · Common · Avacyn Restored · #41
Target creature gets +2/+2 and gains first strike 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 |
|---|---|---|---|---|
| Avacyn Restored | 41 | Common | $0.35 | $0.49 |
| Conspiracy: Take the Crown | 101 | Common | $0.35 | $0.49 |
| The List | CN2-101 | Common | $0.35 | — |