Cheapest priced copy (Foundations Jumpstart): $0.35 at Card Kingdom, near mint, their price list as of .
Defiant Strike 
Instant · Common · Khans of Tarkir · #7
Target creature gets +1/+0 until end of turn.
Draw a card.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
7 printings · $0.35 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Foundations Jumpstart | 187 | Common | $0.35 | — |
| Khans of Tarkir | 7 | Common | $0.35 | $0.49 |
| Core Set 2021 | 15 | Common | $0.35 | $0.49 |
| The List | WAR-9 | Common | $0.35 | — |
| Strixhaven Mystical Archive | 3 | Uncommon | $0.35 | $0.49 |
| Strixhaven Mystical Archive | 66 | Uncommon | $0.59 | $0.79 |
| War of the Spark | 9 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 23 June 2020If the target creature is an illegal target by the time Defiant Strike tries to resolve, the spell won't resolve. You won't draw a card.