You can make your spells seem much more impressive than they truly are.
Prerequisite: Spell Focus
Benefit: While casting a spell from a school of magic in which you have Spell Focus, you can cause a bewildering show of lights and sounds to accompany the spellcasting. Casting a spell in this way takes at least a full round, even if the casting time of the spell is normally less than this. Make a Spellcraft check to demoralize all foes within 30 feet who can see your display (this works identically to the way the Intimidate skill’s demoralizing ability does).
Adventurer’s Handbook: Genius Guide Volume 1