Cheapest priced copy (Double Masters 2022): $0.35 at Card Kingdom, near mint, their price list as of .
Kruin Striker 
Creature — Human Warrior · 2/1 · Common · Duel Decks: Mind vs. Might · #40
Whenever another creature you control enters, this creature gets +1/+0 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 $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters 2022 | 114 | Common | $0.35 | $0.49 |
| Avacyn Restored | 143 | Common | $0.35 | $0.49 |
| Duel Decks: Mind vs. Might | 40 | Common | $0.35 | — |
| Foundations Jumpstart | 573 | Common | $0.35 | — |