Caladbolg
From Create Your Own Story
The Caladbolg is a legendary weapon obtained by one of your trusty soldiers after some cloaked man lent it to him in the battle of the changelings. After they won without losing a single man, he returned it to you. The Caladbolg seems to have a good effect on the demons and even kills the spirit-like ones. It doesn't use magic; it's just strong.