Proteus( Exemplars of Evil, p. 26)
You are a master of masking your features behind a myriad of disguises.
Spell Focus (PH) (illusion) , Spellcaster Level 10th,
You can sacrifice a prepared spell to cast any lower-level illusion (glamer) spell. In addition, you can cast a prepared illusion (glamer) spell as an immediate action by sacrificing another spell of the same level.