Cheapest priced copy (The Lost Caverns of Ixalan Commander): $0.49 at Card Kingdom, near mint, their price list as of .
Quandrix Command 
Instant · Rare · Strixhaven: School of Mages · #217
Choose two —
• Return target creature or planeswalker to its owner's hand.
• Counter target artifact or enchantment spell.
• Put two +1/+1 counters on target creature.
• Target player shuffles up to three target cards from their graveyard into their library.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
6 printings · $0.49 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| The Lost Caverns of Ixalan Commander | 280 | Rare | $0.49 | — |
| Strixhaven: School of Mages Promos | 217p | Rare | $0.49 | $1.99 |
| Strixhaven: School of Mages Promos | 217s | Rare | — | $1.49 |
| Secrets of Strixhaven Commander | 325 | Rare | $0.49 | — |
| Strixhaven: School of Mages | 217 | Rare | $0.49 | $0.79 |
| Strixhaven: School of Mages | 349 | Rare | $0.79 | $0.79 |
3 rulings from Wizards of the Coast
- 16 April 2021As Quandrix Command tries to resolve, if the fourth mode is chosen and all of the target cards are illegal, but the target player is still legal, that player will still shuffle their library.
- 16 April 2021If all of Quandrix Command's targets are illegal as it tries to resolve, it will do nothing.
- 16 April 2021If at least one target is still legal as Quandrix Command tries to resolve, it will resolve and do as much as it can.