You can blend the power of arcane and divine magic.
Benefit: You can augment the power of your divine spells with arcane energy and augment your arcane spells with divine energy.
When casting an arcane spell, you may sacrifice a divine spell slot or prepared divine spell of the same or higher level as a swift action. Half the damage dealt by the arcane spell becomes holy (if you channel positive energy) or unholy (if you channel negative energy).
Pathfinder Roleplaying Game Ultimate Magic. © 2011, Paizo Publishing, LLC; Authors: Jason Bulmahn, Tim Hitchcock, Colin McComb, Rob McCreary, Jason Nelson, Stephen Radney-MacFarland, Sean K Reynolds, Owen K.C. Stephens, and Russ Taylor.