Cannon Island sits between Big Jasper and Little Jasper, and is used as a combination lighthouse/guardpost to protect the Jaspers from attack by sea. It also houses an entrance to a secret tunnel that serves as an escape route from Little Jasper in emergencies, as well as a backdoor into the Chromeria. The Blackguards jealously protect the secret status of this tunnel. If anyone were to betray the secret of the tunnel, the Blackguards would hunt them down and kill them. Or, as Ironfist put it: "I'll tear your arms off and beat you with them."