Cheapest priced copy (Foundations): $0.35 at Card Kingdom, near mint, their price list as of .
Diamond Mare 
Artifact Creature — Horse · 1/3 · Uncommon · Foundations · #770
As this creature enters, choose a color.
Whenever you cast a spell of the chosen color, you gain 1 life.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
4 printings · $0.35 to $3.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Foundations | 672 | Uncommon | $0.35 | — |
| Foundations | 770 | Uncommon | — | — |
| Core Set 2019 | 231 | Uncommon | $0.35 | $3.49 |
| The List | M19-231 | Uncommon | $0.35 | — |