Inferno Fist is a common Enchantment — Aura card from Magic 2015 (M15), collector number 150. Current market price: $0.06 (foil $0.37), TCGplayer market prices via Scryfall.
Enchant creature you control Enchanted creature gets +2/+0. {R}, Sacrifice this Aura: This Aura deals 2 damage to any target.