Evasive Maneuvers

(Exemplars of Evil, page 24, DnD 3.5)

[General]

You can vanish into the confusion created by area spells.

Prerequisite

Cunning Evasion, Spell Focus (illusion), Spellcaster Level 11th, evasion, ability to cast invisibility

Benefit

Once per encounter, if you are caught within an area attack whose damage you completely avoid due to evasion or improved evasion, you can cast a prepared or known invisibility spell as an immediate action.