Elemental Weapon

When you choose this feat, choose one of the following damage types : acid, cold, fire, lightning, or thunder. When you deal damage with this weapon, you ignore resistances for the chosen damage type, your weapons damage can by the chosen over the original damage type. When the weapon does the damage, it deals an additional 1 damage. You can choose this feat multiple times. Each time you do so, you must choose a different damage type.