Cheapest priced copy (Champions of Kamigawa): $10.99 at Card Kingdom, near mint, their price list as of .
Kusari-Gama 
Artifact — Equipment · Rare · Champions of Kamigawa · #260
Equipped creature has "{2}: This creature gets +1/+0 until end of turn."
Whenever equipped creature deals damage to a blocking creature, this Equipment deals that much damage to each other creature defending player controls.
Equip {3} ({3}: Attach to target creature you control. Equip only as a sorcery.)
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $10.99 to $27.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Champions of Kamigawa | 260 | Rare | $10.99 | $27.99 |