When Kalain enters, create a Treasure token. (It's an artifact with ", Sacrifice this token: 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.
Kalain, Reclusive Painter (Showcase) (AFR-342) - Adventures in the Forgotten Realms: (Showcase)
, Sacrifice this token: Add one mana of any color.")
