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.)
Near Mint - $12.70
Lightly Played - $11.40
Played - $8.90
Heavily Played - $7.60
Damaged - $6.40
Near Mint Non-English - $12.70
Lightly Played Non-English - $11.40
Played Non-English - $8.90
Heavily Played Non-English - $7.60
Damaged Non-English - $6.40