Materials
Northlander Sword Billet
Northlander Sword Billet
Teyvat's Resources
4★
Material
Weapon forging material. Can be used to forge 4-star swords.
Philosophers believe marble has the potential to be sculpted into a beautiful statue. Likewise, these billets have the potential to become something greater.
Sources:
Reward for completing Trounce Domain Challenge in Mondstadt, Liyue, or Inazuma, or the Dominator of Wolves Challenge