Theurgy

You can augment the power of your divine spells with arcane energy and augment your arcane spells with divine energy.

When casting a divine spell, you may sacrifice an arcane spell slot or arcane prepared spell of that spell's level or higher as a swift action. The caster level for that divine spell increases by +1.

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).

You can augment the power of your divine spells with arcane energy and augment your arcane spells with divine energy.

When casting a divine spell, you may sacrifice an arcane spell slot or arcane prepared spell of that spell's level or higher as a swift action. The caster level for that divine spell increases by +1.

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).