Cheapest priced copy (Theros Beyond Death): $0.35 at Card Kingdom, near mint, their price list as of .
Eidolon of Inspiration 
Enchantment Creature — Spirit · 2/2 · Uncommon · Theros Beyond Death · #271
At the beginning of combat on your turn, target creature you control gets +2/+0 until end of turn.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Theros Beyond Death | 271 | Uncommon | $0.35 | — |