The Last Bell is supposedly a gigantic bell that is said to have been created at the dawn of the iron age. It supposedly weighs more than 3 bull elephants. The legendary device is supposed to have fallen into an ice crevasse after destroying everything within a three mile radius of it.
The humans and their allies brought back to the Arcanum a series of earth from around the bell as well as metal shavings from the bell. The Arcanum plans to use the Last Bell as a test project for their great manhattan project, and should theoretically be able to teleport the Last Bell before trying to teleport the Sampo.