Once you know which creatures (or objects or areas) are affected, and whether those creatures have made successful saving throws (if any were allowed), you can apply whatever results a spell entails.
Find topic in: Rules of the Game
Reading Spell Descriptions - Part 6
Casting Casting Magic dnd Spell's wizards Spells 3.5 dungeons srd d20 d20 Spells rpg Spells Spells Casting wizards Spells dragons The dragons 3.5 SRD Result wizards roleplaying d&d Overview d&d d20 The d20 dragons dungeons srd dragons d&d wizards dragons