Conductive Machete is a uncommon Artifact — Equipment card from Duskmourn: House of Horror (DSK), collector number 244. Current market price: $0.16 (foil $0.19), TCGplayer market prices via Scryfall.
When this Equipment enters, manifest dread, then attach this Equipment to that creature. (Look at the top two cards of your library. Put one onto the battlefield face down as a 2/2 creature and the other into your graveyard. Turn it face up any time for its mana cost if it's a creature card.) Equipped creature gets +2/+1. Equip {4}