Kalain, Reclusive Painter (HBG-237) - Alchemy Horizons: Baldur's Gate

When Kalain, Reclusive Painter enters, create a Treasure token. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")
Other creatures you control enter with an additional +1/+1 counter on them for each mana from a Treasure spent to cast them.