Mortarpod is a uncommon Artifact — Equipment card from Mirrodin Besieged (MBS), collector number 115. Current market price: $0.15 (foil $0.53), 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 +0/+1 and has "Sacrifice this creature: This creature deals 1 damage to any target." Equip {2}