Cheapest priced copy (Legends): $179.99 at Card Kingdom, near mint, their price list as of .
In the Eye of Chaos 
World Enchantment · Rare · Legends · #61
Whenever a player casts an instant spell, counter it unless that player pays {X}, where X is its mana value.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $179.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Legends | 61 | Rare | $179.99 | — |
2 rulings from Wizards of the Coast
- 4 October 2004This ability triggers when the spell is cast.
- 1 October 2008This has the supertype world. When a world permanent enters, any world permanents that were already on the battlefield are put into their owners' graveyards. This is a state-based action called the "world rule." The new world permanent stays on the battlefield. If two world permanents enter at the same time, they're both put into their owners' graveyards.