Cheapest priced copy (Amonkhet): $0.35 at Card Kingdom, near mint, their price list as of .
Brute Strength 
Instant · Common · Foundations Jumpstart · #528
Target creature gets +3/+1 and gains trample until end of turn. (It can deal excess combat damage to the player or planeswalker it's attacking.)
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
6 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Amonkhet | 122 | Common | $0.35 | $0.49 |
| Duel Decks: Merfolk vs. Goblins | 35 | Common | $0.35 | — |
| Game Night 2019 | 37 | Common | $0.35 | — |
| Foundations Jumpstart | 528 | Common | $0.35 | — |
| Oath of the Gatewatch | 103 | Common | $0.35 | $0.49 |
| The List | DDT-35 | Common | $0.35 | — |