Blight Sickle is a common Artifact — Equipment card from Shadowmoor (SHM), collector number 247. Current market price: $0.29 (foil $2.38), TCGplayer market prices via Scryfall.
Equipped creature gets +1/+0 and has wither. (It deals damage to creatures in the form of -1/-1 counters.) Equip {2}