Throes of Chaos [Universes Beyond: Doctor Who]

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.)
Rarity: U
Card Number: #227
Type: Sorcery