Unearthly Glamour

Ranged spell
Daily
Effect: 

You gain a +5 bonus to all Charisma skill checks for the next five minutes. If you fail a Charisma skill check during this time, however, anyone you were attempting to convince or influence with the check is freaked out or disgusted by the supernatural glamour attached to you and has extremely negative reactions to you.

7th Level Spell: 
The effect lasts for 1 hour.
9th Level Spell: 
The effect lasts for 2 hours.