Thirsting Axe is a uncommon Artifact — Equipment card from Eldritch Moon (EMN), collector number 202. Current market price: $0.06 (foil $0.16), TCGplayer market prices via Scryfall.
Equipped creature gets +4/+0. At the beginning of your end step, if equipped creature didn't deal combat damage to a creature this turn, sacrifice it. Equip {2}