Quandrix, the Proof

Format legality

Where you can play Quandrix, the Proof in sanctioned and popular formats.

All printings (3)

Prices range from $1.16 to $7.76 across finishes. Cheapest printing: Secrets of Strixhaven at $1.16.

More from Secrets of Strixhaven

See all 368 cards in Secrets of Strixhaven →

Rulings

Official rulings from Wizards of the Coast (9).

• 2026-03-20A spell's mana value is determined only by its mana cost. Ignore any alternative costs, additional costs, cost increases, or cost reductions.
• 2026-03-20If the card has {X} in its mana cost, you must choose 0 as the value of X when casting it without paying its mana cost.
• 2026-03-20The mana value of a split card is determined by the combined mana cost of its two halves. If cascade allows you to cast a split card, you may cast either half (as long as the resulting spell would have lesser mana value than the spell with cascade) but not both halves.
• 2026-03-20If a spell with cascade is countered, the cascade ability will still resolve normally.
• 2026-03-20Cascade triggers when you cast the spell, meaning that it resolves before that spell. If you end up casting the exiled card, it will go on the stack above the spell with cascade.
• 2026-03-20You exile the cards face up. All players will be able to see them.
• 2026-03-20Not only do you stop exiling cards if you exile a nonland card with lesser mana value than the spell with cascade, but the resulting spell you cast must also have lesser mana value.
• 2026-03-20When the cascade ability resolves, you must exile cards. The only optional part of the ability is whether or not you cast the last card exiled.
• 2026-03-20If you cast a card "without paying its mana cost," you can't choose to cast it for any alternative costs. You can, however, pay additional costs. If the card has any mandatory additional costs, you must pay those to cast the card.

Frequently asked questions