Orim of the Shadow:
At the last moment I was able to weaken Zeruel. It is not permanent, however. If I were to lose my concentration for even one second, Zeruel and his minions will escape.
Zeruel himself holds the key to seal the box permanently. We must take the key from him and then seal him in again. To do so, we need 2 things, the Sword of Binding and the Soul-trap Crystal... Once we get these things, we will be able to bring Zeruel down and seal his spirit permanently back in the box.
You should be able to get the Sword of Binding from Sir Klaus Vasper in Gludin. I will write you a letter explaining the situation. He won't be inclined to lend his sword to a practitioner of Witchcraft... Do what you can to win his trust and borrow the sword from him.
As for the Soul-trap Crystal, go and see Magister Iker of Giran. She is also hostile to Witchcraft, but if you explain the urgency of the situation she should let you borrow it.
Meanwhile I will do my best to keep Zeruel under control. Please hurry! Although Zeruel is still weak, once he gets his strength back no one will be able to resist him!