Cheapest priced copy (Double Masters): $0.35 at Card Kingdom, near mint, their price list as of .
Gleaming Barrier 
Artifact Creature — Wall · 0/4 · Common · Rivals of Ixalan · #178
Defender
When this creature dies, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")
Legal inCommanderBrawlStandardPioneerModernLegacyVintagePauper
4 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Double Masters | 257 | Common | $0.35 | $0.49 |
| Foundations | 252 | Common | $0.35 | $0.49 |
| Jumpstart 2022 | 768 | Common | $0.35 | — |
| Rivals of Ixalan | 178 | Common | $0.35 | $0.49 |