Quandrix, the Proof
Quandrix, the Proof Price Summary
As of Aug 6, 2026, the cheapest tracked printing of Quandrix, the Proof is $1.82 (SOS #218), and the most expensive is $8.89 (PSOS #218p, Promo Pack, Foil). The benchmark price (cheapest playable nonfoil) is $1.82, down 14.6% over 7 days, down 5.2% over 30 days, down 62.9% over 90 days. All-time tracked high: $31.70 (2026).
Quandrix, the Proof Printings & Prices
Quandrix, the Proof has 3 tracked printings across 2 sets, in nonfoil and foil finishes, including promo pack and borderless treatments.
Sell Quandrix, the Proof: Buylist Offers
Card Kingdom currently pays $5.60 cash for SOS #286 (Foil); the retail-buylist spread on that printing is 60% (wide).
| Buyer | Printing | Finish | Cash offer | Retail | Spread |
|---|---|---|---|---|---|
| Card Kingdom | SOS #286 | Foil | $5.60 | $13.99 | 60% |
| Card Kingdom | PSOS #218p | Foil | $4.40 | $10.99 | 60% |
| Card Kingdom | SOS #286 | Nonfoil | $1.85 | $5.49 | 66% |
| Card Kingdom | SOS #218 | Foil | $0.75 | $2.99 | 75% |
| Card Kingdom | PSOS #218p | Nonfoil | $0.35 | $2.29 | 85% |
| Card Kingdom | SOS #218 | Nonfoil | $0.15 | $0.99 | 85% |
Quandrix, the Proof Rules Text & Legality
Flying, trample
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.)
Instant and sorcery spells you cast from your hand have cascade.
Quandrix, the Proof is legal in Standard, Pioneer, Modern, Legacy and Commander, and not legal in Pauper.
Quandrix, the Proof Rulings
- Mar 20, 2026 A spell's mana value is determined only by its mana cost. Ignore any alternative costs, additional costs, cost increases, or cost reductions.
- Mar 20, 2026 Cascade 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.
- Mar 20, 2026 If a spell with cascade is countered, the cascade ability will still resolve normally.
- Mar 20, 2026 If 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.
- Mar 20, 2026 If 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.
Reprints & Reprint Risk
Quandrix, the Proof has been reprinted 4 times. The Secrets of Strixhaven reprint cut the price 62% in 30 days.
| Set | Date | Rarity | Treatment | Price before | Day 1 | 30 days | 90 days |
|---|---|---|---|---|---|---|---|
| SOS #286 | 2026-04-24 | Mythic | Borderless | $22.20 | $15.87 | $10.85 | $5.41 |
| SOS #286 | 2026-04-24 | Mythic | Borderless | $29.07 | $25.58 | $15.63 | $6.49 |
| SOS #218 | 2026-04-24 | Mythic | Standard | $10.70 | $8.43 | $4.11 | $2.45 |
| SOS #218 | 2026-04-24 | Mythic | Standard | $11.63 | $9.43 | $4.72 | $2.44 |
SOS #286 Quandrix, the Proof in Commander
Quandrix, the Proof is the #8,238 most-played card on EDHREC, up 714 places over the last 30 days.
Quandrix, the Proof FAQ
How much is Quandrix, the Proof worth?
Quandrix, the Proof is worth about $1.82 for its cheapest playable printing as of Aug 6, 2026. Prices range from $1.82 to $8.89 across 3 tracked printings.
Is Quandrix, the Proof legal in Commander?
Yes — Quandrix, the Proof is legal in Commander. It is also legal in Standard, Pioneer, Modern and Legacy.
Has Quandrix, the Proof been reprinted?
Yes — Quandrix, the Proof has been reprinted 4 times, with 3 printings tracked on The Index.
Why is Quandrix, the Proof cheap?
Quandrix, the Proof trades at about $1.82 — 4 reprints keep supply plentiful, and Commander demand is modest (#8,238 on EDHREC).