Cheapest priced copy (Portal Three Kingdoms): $1.29 at Card Kingdom, near mint, their price list as of .
Preemptive Strike 
Instant · Common · Portal Three Kingdoms · #50
Counter target creature spell.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
1 printing · $1.29 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Portal Three Kingdoms | 50 | Common | $1.29 | — |