Cheapest priced copy (Strixhaven: School of Mages Promos): $0.49 at Card Kingdom, near mint, their price list as of .
Elite Spellbinder 
Creature — Human Cleric · 3/1 · Rare · Strixhaven: School of Mages · #289
Flying
When this creature enters, look at target opponent's hand. You may exile a nonland card from it. For as long as that card remains exiled, its owner may play it. A spell cast this way costs {2} more to cast.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
5 printings · $0.49 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Strixhaven: School of Mages Promos | 17p | Rare | $0.49 | $1.99 |
| Strixhaven: School of Mages Promos | 17s | Rare | — | $1.79 |
| Secret Lair Countdown | 2021 | Rare | $1.29 | $1.49 |
| Strixhaven: School of Mages | 17 | Rare | $0.49 | $0.79 |
| Strixhaven: School of Mages | 289 | Rare | $0.79 | $1.49 |
2 rulings from Wizards of the Coast
- 16 April 2021Playing the exiled card follows all normal timing restrictions.
- 16 April 2021If the exiled card is a modal double-faced card and its back face is a land, its owner may play it as a land. (Note that if the front face is also a land, you couldn’t have exiled it to begin with.)