Cheapest priced copy (Mystery Booster 2): $0.49 at Card Kingdom, near mint, their price list as of .
King's Assassin 
Creature — Human Assassin · 1/1 · Rare · Portal · #98
{T}: Destroy target tapped creature. Activate only during your turn, before attackers are declared.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $0.49 to $4.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Mystery Booster 2 | 43 | Rare | $0.49 | — |
| Portal | 98 | Rare | $4.99 | — |