Maelstrom Nexus (Commander: Dominaria United)

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 in a random order.)

NM - $3.00
LP - $2.50
MP - $2.00
HP - $2.00
DMG - $2.00