Cheapest priced copy (Modern Horizons 3): $2.79 at Card Kingdom, near mint, their price list as of .
Flare of Duplication 
Instant · Rare · Modern Horizons 3 · #416
You may sacrifice a nontoken red creature rather than pay this spell's mana cost.
Copy target instant or sorcery spell. You may choose new targets for the copy.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
4 printings · $2.79 to $54.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Modern Horizons 3 | 119 | Rare | $2.79 | $3.49 |
| Modern Horizons 3 | 333 | Rare | $8.99 | $54.99 |
| Modern Horizons 3 | 416 | Rare | $3.49 | $24.99 |
| Modern Horizons 3 Promos | 119s | Rare | — | $7.99 |
7 rulings from Wizards of the Coast
- 7 June 2024If the spell has damage divided as it was cast, the division can't be changed (although the targets receiving that damage still can). The same is true of spells that distribute counters.
- 7 June 2024The copy will have the same targets as the spell it's copying unless you choose new ones. You may change any number of the targets, including all of them or none of them. If, for one of the targets, you can't choose a new legal target, then it remains unchanged (even if the current target is illegal).
- 7 June 2024If you copy a spell, you control the copy. It will resolve before the original spell does.
- 7 June 2024If the spell that's copied is modal (that is, it says "Choose one —" or the like), the copy will have the same mode. A different mode can't be chosen.
- 7 June 2024The copy is created on the stack, so it's not "cast." Abilities that trigger when a player casts a spell won't trigger.
- 7 June 2024The controller of a copy can't choose to pay any alternative or additional costs for the copy. However, effects based on any alternative or additional costs that were paid for the original spell are copied as though those same costs were paid for the copy.
- 7 June 2024If the spell that's copied has an X whose value was determined as it was cast (like Kozilek's Command does), the copy will have the same value of X.