Sunstone Weapons (Uncommon)
Amongst certain religions and orders, there are forged weapons who's cutting, crushing or piercing parts are wrought from magically strengthened sun stone. These weapons are then blessed with holy power, and become deadly towards the undead, as well as other entities that find the light of the Sun anathema.
Sunstone Weapons behave in all ways like their normal versions, save, the damage they inflict is considered to be Radiant for the purposes of weaknesses. Note it isn't Radiant. However, a creature that is vulnerable to Radiant damage is also vulnerable to the Slashing, Piercing or Bludgeoning damage of one of these weapons.