Chilling Bones (3.5e Feat)
From D&D Wiki
Turning the very marrow of your bones to ice allows you assail your foes with stinging cold while protecting you from similar attacks.
Prerequisite: Boneshaper level 3, Shape bone class feature, 13 Con
Benefit: You may choose to have weapons you shape deal an additional 1d6 of cold damage. You may also choose to have armor you shape provide cold resistance 10. These effects cannot be applied to a weapon or armor that already adds elemental damage or resistance (except that provided by aweapon or armor crystal).
Normal: Shaped weapons and armor cannot have elemental enchantments