Transdimensional Spell

 
Prerequisite(s): None
 
Benefit: A transdimensional spell has full, normal effect upon incorporeal creatures, creatures on the Ethereal Plane or Plane of Shadow, and creatures within an extradimensional space in the spell's area. Such creatures include ethereal creatures, creatures that are blinking or shadow walking, manifested ghosts, and creatures within the extradimensional space of a rope trick or portable hole. You must be able to perceive a creature to target it with a spell, but you do not need to perceive a creature to catch it in the area of a burst, cone, emanation, or spread. A transdimensional spell uses up a spell slot one level higher than the spell's actual level.
 
Source: Complete Arcane, Complete Divine