Cheapest priced copy (Scourge): $0.35 at Card Kingdom, near mint, their price list as of .
Mercurial Kite 
Creature — Bird · 2/2 · Common · Scourge · #39
Flying
Whenever this creature deals combat damage to a creature, tap that creature. That creature doesn't untap during its controller's next untap step.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Scourge | 39 | Common | $0.35 | $0.49 |