The Nemesis is the mobile base and warship for the Decepticons to patrol areas around various planets in which they mainly patrol cold areas such as Antartica on Earth and especially hostile planets orbiting Metally the home of the hostile plaguing shape shifting species Metalers. In response to Metaler attack on Cybertron and Starscream's death at the hands of Medusa, the Decepticons launched the ship and orbited above Metally where scanned and studied the planet's geography to know the lore behind the Metalers.