Thieves' Tools is a common Artifact — Equipment card from Foundations Jumpstart (J25), collector number 126. Current market price: $0.28, TCGplayer market prices via Scryfall.
When this Equipment enters, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.") Equipped creature can't be blocked as long as its power is 3 or less. Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)