Cheapest priced copy (Foundations Jumpstart): $0.35 at Card Kingdom, near mint, their price list as of .
Predator's Strike 
Instant · Common · Mirrodin · #128
Target creature gets +3/+3 and gains trample until end of turn. (It can deal excess combat damage to the player or planeswalker it's attacking.)
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
4 printings · $0.35 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Foundations Jumpstart | 699 | Common | $0.35 | — |
| Mirrodin | 128 | Common | $0.35 | $0.99 |
| The List | MRD-128 | Common | $0.35 | — |
| Salvat 2005 | K52 | Common | — | — |