Rune of Mortality is a uncommon Enchantment — Aura Rune card from Kaldheim (KHM), collector number 108. Current market price: $0.20 (foil $0.46), TCGplayer market prices via Scryfall.
Enchant permanent When this Aura enters, draw a card. As long as enchanted permanent is a creature, it has deathtouch. As long as enchanted permanent is an Equipment, it has "Equipped creature has deathtouch."