Maelstrom Nexus [Double Masters]

Set: Double Masters Type: Enchantment Mythic Cost: {W}{U}{B}{R}{G} The first spell you cast each turn has cascade. (When you cast your first 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.)