Darksteel Mutation is a uncommon Enchantment — Aura card from Secrets of Strixhaven Commander (SOC), collector number 142. Current market price: $1.16, TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature is an Insect artifact creature with base power and toughness 0/1 and has indestructible, and it loses all other abilities, card types, and creature types.