Storm-Kiln Artist (Secrets of Strixhaven Commander #255)

Creature — Dwarf Shaman - {3}{R}
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.")
2/2
„A captured elemental makes for a potent, albeit unstable, power source.“