Thanks for the response... so youve used it in play this way... is this a hosue rule or do you figure it is covered by the rules? I ask because the spell actaully says in the spell description that you can fire the second ray on the same round you fire the first... hence my questions...
I believe it's covered by the rules. 3.5 is a permissive system. Other spells that allow you to "discharge" them as a swift, immediate, or free action indicate such in the text of the spell. If it's missing, you're usually required to take the action appropriate to discharge them, such as taking an attack action or standard action. It doesn't matter if the spell allows you to cast one ray or fifty rays during the attack action.