Stalactite Dagger is a common Artifact — Equipment card from Lorwyn Eclipsed (ECL), collector number 261. Current market price: $0.23 (foil $0.29), TCGplayer market prices via Scryfall.
When this Equipment enters, create a 1/1 colorless Shapeshifter creature token with changeling. (It's every creature type.) Equipped creature gets +1/+1 and is all creature types. Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)