You can make incantation-enhanced attacks of opportunity.
Benefit: When you make an attack of opportunity, you can use any incantation you know with a range of touch, if you have at least one hand free. Channeling this incantation is an immediate action.
You cannot use this feat with a touch incantation whose channeling time is longer than 1 full-round action.
Using this feat increases the channeling DC of the incantation by 6. The incantation’s DC cannot exceed your maximum DC.
Normal: Attacks of opportunity can be made only with melee weapons.