There are many different technologies, most powered by whale oil, found throughout the Empire of the Isles. Some are benign and helpful, like the streetlight and the motorized vehicles; others, like the floodlight and the wall of light, are a response to the rats and the rat plague; and some are militaristic, such as the tallboy, the watchtower, and the Clockwork Soldier, used by various corrupt regimes to control and oppress the populace.