Stalhrim Crafter

Craft an item out of Stalhrim - the Dragonborn ice-like material. First learn to work it by completing the quest 'A New Source of Stalhrim' (help Deor in Skaal Village solve a smith's disappearance), then mine Stalhrim deposits on Solstheim and craft any Stalhrim weapon or armour at a forge (you need the Ebony Smithing perk). One crafted item does it.