When Kalain, Reclusive Painter enters the battlefield, create a Treasure token (A Treasure is an artifact with ", Sacrifice this artifact: Add one mana of any color.").
Other creatures you control enter the battlefield with an additional +1/+1 counter on them for each mana from a Treasure spent to cast them.
The information presented on this site about Magic: The Gathering, both literal and graphical, is copyrighted by Wizards of the Coast.
This website is not produced, endorsed, supported, or affiliated with Wizards of the Coast.