Cheapest priced copy (Champions of Kamigawa): $0.35 at Card Kingdom, near mint, their price list as of .
Indomitable Will 
Enchantment — Aura · Common · Jumpstart · #109
Flash (You may cast this spell any time you could cast an instant.)
Enchant creature
Enchanted creature gets +1/+2.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
4 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Champions of Kamigawa | 17 | Common | $0.35 | $0.49 |
| Foundations Jumpstart | 210 | Common | $0.35 | — |
| Jumpstart | 109 | Common | $0.35 | — |
| Theros Beyond Death | 25 | Common | $0.35 | $0.49 |