Cheapest priced copy (Odyssey): $0.35 at Card Kingdom, near mint, their price list as of .
Sphere of Duty 
Enchantment · Uncommon · Odyssey · #48
If a green source would deal damage to you, prevent 2 of that damage.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.35 to $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Odyssey | 48 | Uncommon | $0.35 | $2.99 |