You are a hero, one tasked with finding all of the Legendary artifacts, one of which being the Ghostblade, currently rumored to be in the library in your home town

You head to the outside of your town's library and you find a commotion outside, everyone is talking about hunting some kind of demon or spirit, so you talk to them, and ell them you'll figure out the hostility, and then report back, so you head in, and inside, you quickly find a banshee, just chilling out in a corner, reading a book