Cheapest priced copy (Tempest): $0.35 at Card Kingdom, near mint, their price list as of .
Manta Riders 
Creature — Merfolk · 1/1 · Common · Battle Royale Box Set · #43
{U}: This creature gains flying until end of turn.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
2 printings · $0.35 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Battle Royale Box Set | 43 | Common | $0.79 | — |
| Tempest | 74 | Common | $0.35 | — |