Cheapest priced copy (Revised Edition): $0.35 at Card Kingdom, near mint, their price list as of .
Spell Blast 
Instant · Common · Summer Magic / Edgar · #82
Counter target spell with mana value X. (For example, if that spell's mana cost is {3}{U}{U}, X is 5.)
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
17 printings · $0.35 to $69.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Unlimited Edition | 80 | Common | $1.29 | — |
| 30th Anniversary Edition | 79 | Common | $0.99 | — |
| 30th Anniversary Edition | 376 | Common | $69.99 | — |
| Revised Edition | 82 | Common | $0.35 | — |
| Fourth Edition Foreign Black Border | 103 | Common | — | — |
| Fourth Edition | 103 | Common | $0.35 | — |
| Fifth Edition | 126 | Common | $0.35 | — |
| Classic Sixth Edition | 100 | Common | $0.35 | — |
| Collectors' Edition | 80 | Common | $2.29Out of stock | — |
| Intl. Collectors' Edition | 80 | Common | $2.99 | — |
| Foreign Black Border | 82 | Common | — | — |
| Limited Edition Alpha | 79 | Common | $32.99 | — |
| Limited Edition Beta | 80 | Common | $5.99 | — |
| Magic 2014 | 72 | Uncommon | $0.35 | $0.49 |
| Pro Tour Collector Set | shr103 | Common | $0.35 | — |
| Summer Magic / Edgar | 82 | Common | — | — |
| Tempest | 89 | Common | $0.35 | — |
2 rulings from Wizards of the Coast
- 1 July 2013If the target spell has {X} in its mana cost, include the value chosen for that X when determining the value of the {X} in Spell Blast's mana cost. For example, if you wish to counter Volcanic Geyser (a spell with mana cost {X}{R}{R}) whose X is 7, you'll need to choose 9 for Spell Blast's X and pay {9}{U}.
- 1 July 2013Alternative costs, additional costs, cost increases, and cost reductions don't affect a spell's mana value.