Thornbite Staff is a uncommon Kindred Artifact — Shaman Equipment card from Morningtide (MOR), collector number 145. Current market price: $17.70 (foil $65.84), TCGplayer market prices via Scryfall.
Equipped creature has "{2}, {T}: This creature deals 1 damage to any target" and "Whenever a creature dies, untap this creature." Whenever a Shaman creature enters, you may attach this Equipment to it. Equip {4}