Precons with Throes of Chaos

Throes of Chaos

Sorcery

Cascade (When you cast this 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.)Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.)