Maelstrom Nexus

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.){flavor}All was shattered, and all but memory lost, and one memory above all others, of him who brought the Shadow and the Breaking of the World.