Lashwrithe is a rare Artifact — Equipment card from New Phyrexia (NPH), collector number 143. Current market price: $0.84 (foil $7.50), TCGplayer market prices via Scryfall.
Living weapon (When this Equipment enters, create a 0/0 black Phyrexian Germ creature token, then attach this to it.) Equipped creature gets +1/+1 for each Swamp you control. Equip {B/P}{B/P} ({B/P} can be paid with either {B} or 2 life.)