Kusari-Gama

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.)

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6olx70fxzppb1hldffzhzw.