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.)
Illustrated by
Forgotten Realms Commander#146UncommonEnglishLegality
Rulings
Throes of Chaos does nothing as it resolves. All of its chaos happens before it resolves.
The cascade ability triggers when you cast the spell, meaning that it resolves before the spell. It resolves even if the spell is countered. If you cast the card exiled by the cascade ability, that spell will go on the stack above the spell with cascade.
You exile the cards face up. All players will be able to see them.
You don’t have to cast the last card exiled by a cascade ability. If you choose to do so, you cast it as a spell. It can be countered, and any abilities that look for spells cast (such as cascade, if that spell has cascade) can see it.
When a spell you cast with retrace resolves or is countered, it’s put back into your graveyard. You may use the retrace ability to cast it again.