Cheapest priced copy (Core Set 2019): $0.35 at Card Kingdom, near mint, their price list as of .
Lightning Mare 
Creature — Elemental Horse · 3/1 · Uncommon · Core Set 2019 · #151
This spell can't be countered.
This creature can't be blocked by blue creatures.
{1}{R}: This creature gets +1/+0 until end of turn.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Core Set 2019 | 151 | Uncommon | $0.35 | $0.49 |