Rune of Might is a uncommon Enchantment — Aura Rune card from Kaldheim (KHM), collector number 191. Current market price: $0.29 (foil $0.30), TCGplayer market prices via Scryfall.
Enchant permanent When this Aura enters, draw a card. As long as enchanted permanent is a creature, it gets +1/+1 and has trample. As long as enchanted permanent is an Equipment, it has "Equipped creature gets +1/+1 and has trample."