Cheapest priced copy (Commander Legends: Battle for Baldur's Gate): $0.35 at Card Kingdom, near mint, their price list as of .
Marching Duodrone 
Artifact Creature — Construct · 2/2 · Common · Commander Legends: Battle for Baldur's Gate · #321
Whenever this creature attacks, each player creates a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Legends: Battle for Baldur's Gate | 321 | Common | $0.35 | $0.49 |
| Commander Legends: Battle for Baldur's Gate | 447 | Common | $0.35 | $0.49 |