How do you get the items? If you are able to kill a boss for the first time outside of a quest, you have the chance to get the raw materials of the five weapon types. Furthermore, you will occasionally get some when you upgrade the “Permafrost Tree” in Dragon’s Ridge and the “Holy Sakura” in Inazuma. They are also rarely available as event rewards.
What do the items do? The unprocessed weapons are used by the blacksmith. He can craft a weapon from them that belongs to the same species as the raw material.