Cheapest priced copy (Odyssey): $0.35 at Card Kingdom, near mint, their price list as of .
Sphere of Reason 
Enchantment · Uncommon · Odyssey · #51
If a blue source would deal damage to you, prevent 2 of that damage.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.35 to $4.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Odyssey | 51 | Uncommon | $0.35 | $4.49 |