When Rain of Riches enters the battlefield, create two Treasure tokens. The first spell you cast each turn that mana from a Treasure was spent to cast has cascade. (When you cast the spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.)
![Rain of Riches (Extended Art) [Streets of New Capenna Commander] | Grognard Games](http://grognardgames.com/cdn/shop/products/473fa74f-f181-5359-8560-6b04d13a7428.jpg?v=1652472160)
