Heirloom Blade is a uncommon Artifact — Equipment card from The Lost Caverns of Ixalan Commander (LCC), collector number 303. Current market price: $0.29, TCGplayer market prices via Scryfall.
Equipped creature gets +3/+1. Whenever equipped creature dies, you may reveal cards from the top of your library until you reveal a creature card that shares a creature type with it. Put that card into your hand and the rest on the bottom of your library in a random order. Equip {1}