Cheapest priced copy (Time Spiral): $0.79 at Card Kingdom, near mint, their price list as of .
Spell Burst 
Instant · Uncommon · Time Spiral · #79
Buyback {3} (You may pay an additional {3} as you cast this spell. If you do, put this card into your hand as it resolves.)
Counter target spell with mana value X.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.79 to $5.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Time Spiral | 79 | Uncommon | $0.79 | $4.99 |
| Time Spiral Remastered | 88 | Uncommon | $0.79 | $5.99 |
One ruling from Wizards of the Coast
- 19 March 2021For spells with {X} in their mana costs, use the value chosen for X to determine the spell's mana value.