Hunt Silver Forest's Spirit in Argent Forest and collect 10 Remains of Spirits. Talk to Kalton Brown in Argent Forest. Use your quest tracker to see your progress.
Carlton Brown: Do you know what the Silver Forest's Spirit was? NakanoAzusa: The spirit of a soldier guarding the forest. And tragic. Carlton Brown: Even after releasing them from the armor, the spirits Carlton Brown: remain. There is however, another solution. NakanoAzusa: What do we need to do? Carlton Brown: You know that there are remains when you eliminate Spirits? HiiragiKagami: Spirit powder? Carlton Brown: You know it well. We have to collect it and burn it. Carlton Brown: That way we can release the spirits once and for all. NakanoAzusa: Can you perform the ritual? Carlton Brown: It is my speciality.
Reminder Dialog
Carlton Brown: I was once in the clergy. Of course you can trust me.