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 - $1.800
Lightly Played - $1.500
Moderately Played - $1.300
Heavily Played - $1.100
Damaged - $900
Near Mint Spanish - $1.800
Lightly Played Spanish - $1.500
Moderately Played Spanish - $1.300
Heavily Played Spanish - $1.100
Damaged Spanish - $900