Primordial Caster
Prerequisite: Requires the ability to cast one spell.
Your blood seethes with elemental power. Select an elemental damage type (acid, cold, fire, lightning, or thunder). This feat can be selected multiple times, choosing a different damage type each time.
Your spells dealing that damage type ignore any damage resistance possessed by the target.
When you cast a spell that deals damage of the chosen type, you deal 1 additional damage for every damage die with a result of 1.