Cheapest priced copy (Secrets of Strixhaven Promos): $0.69 at Card Kingdom, near mint, their price list as of .
Exhibition Tidecaller 
Creature — Djinn Wizard · 0/2 · Rare · Secrets of Strixhaven · #316
Opus — Whenever you cast an instant or sorcery spell, target player mills three cards. If five or more mana was spent to cast that spell, that player mills ten cards instead.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
3 printings · $0.69 to $1.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Secrets of Strixhaven Promos | 48p | Rare | $0.69 | $0.99 |
| Secrets of Strixhaven | 48 | Rare | $0.69 | $0.79 |
| Secrets of Strixhaven | 316 | Rare | $1.49 | $0.99 |
One ruling from Wizards of the Coast
- 20 March 2026An opus ability resolves before the spell that caused it to trigger. It resolves even if that spell is countered or otherwise leaves the stack.