Cheapest priced copy (Strixhaven: School of Mages): $2.99 at Card Kingdom, near mint, their price list as of .
Double Major 
Instant · Rare · Strixhaven: School of Mages · #340
Copy target creature spell you control, except it isn't legendary if the spell is legendary. (A copy of a creature spell becomes a token.)
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $2.99 to $8.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Strixhaven: School of Mages Promos | 179p | Rare | $3.49 | $2.99 |
| Strixhaven: School of Mages Promos | 179s | Rare | — | $8.49 |
| Strixhaven: School of Mages | 179 | Rare | $2.99 | $3.49 |
| Strixhaven: School of Mages | 340 | Rare | $3.99 | $4.49 |
2 rulings from Wizards of the Coast
- 16 April 2021The token that a resolving copy of a spell becomes isn’t said to have been “created.”
- 16 April 2021If a creature spell is copied, it’s put onto the battlefield as a token as the spell resolves rather than putting the copy of the spell onto the battlefield. The rules that apply to a permanent spell becoming a permanent apply to a copy of a spell becoming a token.