Thunder Lasso is a uncommon Artifact — Equipment card from Outlaws of Thunder Junction (OTJ), collector number 35. Current market price: $0.23 (foil $0.27), TCGplayer market prices via Scryfall.
When this Equipment enters, attach it to target creature you control. Equipped creature gets +1/+1. Whenever equipped creature attacks, tap target creature defending player controls. Equip {2}