The City of Bells has many strange magics. However one of the most notable is The Bell of Lost Souls, which, when struck, releases a wave of restless spirits onto the residents of the city, or sucks them in until the next time someone sees fit to strike it.
More will be forthcoming later, but I couldn't resist. :D
Edit: The Peeling Bell: The flesh of whoever hears this bell will begin to peel from their bones. The process takes about a month to finish. It is the doorbell of a deaf, skeleton, writer, who has a small card on his door saying "Do not disturb". All invited guests are told to use a concealed pullcord, which will cause a flag to raise. He believes that those who ring it anyway deserve their fate.