Cheapest priced copy (Conspiracy: Take the Crown): $0.35 at Card Kingdom, near mint, their price list as of .
Windborne Charge 
Sorcery · Uncommon · Conspiracy: Take the Crown · #100
Two target creatures you control each get +2/+2 and gain flying until end of turn.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Conspiracy: Take the Crown | 100 | Uncommon | $0.35 | $0.49 |
| The List | CN2-100 | Uncommon | $0.35 | — |
| Zendikar | 38 | Uncommon | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 1 October 2009You must target two creatures you control as you cast Windborne Charge. If you can’t (because you control just one creature, perhaps), you can’t cast the spell.