Nettlecyst is a rare Artifact — Equipment card from Modern Horizons 2 (MH2), collector number 231. Current market price: $2.50 (foil $6.13), 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 artifact and/or enchantment you control. Equip {2}