Text (4th+errata): Choose one - Counter target red spell; or destroy target red permanent. [Oracle 1999/09/03]
The decision to counter a spell or destroy a permanent is a decision made on announcement before a target of the proper type is selected. If the spell is redirected, this mode cannot be changed, so only targets of the selected type are valid. [Duelist Magazine #8, Page 50] See Rule G13.13 on Modal spells.
Extended tournaments (see Rule 913) have banned this card since 1999/10/01.
Note - Also see Modal Spells and Abilities, Rule G13.13.
Note - This card was of type Interrupt and is now of type Instant. [Oracle 1999/09/03]