Storm-Kiln Artist is a uncommon Creature — Dwarf Shaman card from Secrets of Strixhaven Commander (SOC), collector number 255. Current market price: $1.80, TCGplayer market prices via Scryfall.
This creature gets +1/+0 for each artifact you control. Magecraft — Whenever you cast or copy an instant or sorcery spell, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")