Cheapest priced copy (Commander Legends: Battle for Baldur's Gate): $0.49 at Card Kingdom, near mint, their price list as of .
Gale's Redirection 
Instant · Rare · Commander Legends: Battle for Baldur's Gate · #73
Exile target spell, then roll a d20 and add that spell's mana value.
1—14 | You may cast the exiled card for as long as it remains exiled, and you may spend mana as though it were mana of any color to cast that spell.
15+ | You may cast the exiled card without paying its mana cost for as long as it remains exiled.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
3 printings · $0.49 to $2.29 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Legends: Battle for Baldur's Gate | 73 | Rare | $0.49 | $0.49 |
| Commander Legends: Battle for Baldur's Gate | 563 | Rare | $0.59 | $0.49 |
| Battle for Baldur's Gate Promos | 73s | Rare | — | $2.29 |
3 rulings from Wizards of the Coast
- 10 June 2022If the spell had {X} in its mana cost, X will be whatever value it had on the stack when calculating its mana value.
- 10 June 2022If the exiled card is an adventurer card, you may cast the Adventure spell this way.
- 10 June 2022Gale's Redirection exiles the spell directly from the stack without countering it. Because of this, it's effective against spells that can't be countered.