Cheapest priced copy (World Championship Decks 1997): $4.49 at Card Kingdom, near mint, their price list as of .
Hydroblast 
Instant · Uncommon · Fifth Edition · #94
Choose one —
• Counter target spell if it's red.
• Destroy target permanent if it's red.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
10 printings · $4.49 to $54.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Fifth Edition | 94 | Uncommon | $11.99 | — |
| Eternal Masters | 55 | Uncommon | $11.99 | $32.99 |
| Ice Age | 72 | Common | $9.99 | — |
| Mystery Booster 2 | 165 | Common | $10.99 | $54.99 |
| Oversized League Prizes | 59 | Rare | — | — |
| Oversized League Prizes | 60 | Rare | — | — |
| Pro Tour Collector Set | ml72sb | Common | $6.99 | — |
| World Championship Decks 1997 | js94sb | Uncommon | $4.49 | — |
| World Championship Decks 1997 | pm94sb | Uncommon | $4.49 | — |
| World Championship Decks 1998 | rb72sb | Common | $4.49 | — |
2 rulings from Wizards of the Coast
- 4 October 2004The decision to counter a spell or destroy a permanent is a decision made on announcement before the target is selected. If the spell is redirected, this mode can't be changed, so only targets of the selected type are valid.
- 8 June 2016Hydroblast can target any spell or permanent, not just a red one. It checks the color of the target only on resolution.