Cheapest priced copy (Fifth Dawn): $0.35 at Card Kingdom, near mint, their price list as of .
Horned Helm 
Artifact — Equipment · Common · Fifth Dawn · #132
Equipped creature gets +1/+1 and has trample.
{G}{G}: Attach this Equipment to target creature you control.
Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
2 printings · $0.35 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Fifth Dawn | 132 | Common | $0.35 | $0.99 |
| The List | 5DN-132 | Common | $0.35 | — |