Quietus Spike is a rare Artifact — Equipment card from The Brothers' War Retro Artifacts (BRR), collector number 109. Current market price: $2.13 (foil $3.70), TCGplayer market prices via Scryfall.
Equipped creature has deathtouch. Whenever equipped creature deals combat damage to a player, that player loses half their life, rounded up. Equip {3}