Unseen Spell (Feat)
Your mastery of magic allows you to cast spells with no-one the wiser.
Prerequisites: Caster Level 31, Spell Focus (Feat), Stealth Spell (Feat), Silent Spell (Feat), Still Spell (Feat)
Benefit: An unseen spell gains all the benefits of Stealth Spell (Feat). The spell is not only invisible, but when it goes off it replaces the entire area of effect with an illusion that shows the area as it was. Even targets of the spell itself are unable to tell that anything is wrong except for their own pain and injury (if any). Anyone viewing the scene must make a Will save against the spell's DC to notice the illusion. Targets of the spell itself gain a +2 bonus on this save. This illusion is visual only, so sounds, smell, and touch are unaffected. The illusion persists until the end of combat. If an injured creature moves out of the illusions area of effect, they immediately show all normal effects of the spell. Note that it is possible to overlap areas of effect to 'build up' the area covered by the illusion of normalcy.
Level Increase: +8 (An unseen spell uses up a spell slot eight levels higher than the spell's actual level.)