Cheapest priced copy (Shadowmoor): $0.35 at Card Kingdom, near mint, their price list as of .
Revelsong Horn 
Artifact · Uncommon · Shadowmoor · #261
{1}, {T}, Tap an untapped creature you control: Target creature gets +1/+1 until end of turn.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Shadowmoor | 261 | Uncommon | $0.35 | $0.49 |