You can lace some of your spells with a powerful corrosive element.
Prerequisite: Ability to cast a spell with the acid descriptor
Benefit: This feat can affect any spell that can inflict damage upon an object. When a targeted object fails its save, the spell ignores the object’s hardness and destroy twice as much nonliving matter as normal. A caustic spell has no effect on attended objects. Spells affected by this feat gain the acid descriptor. If the spell already has the acid descriptor, the spell ignores the object’s hardness even upon a successful save. A caustic spell uses up a spell slot of the same level as the spell’s actual level.
Special: This feat cannot be applied to a spell with the electricity descriptor.