The Forerunner Dreadnought, colloquially known as the Forerunner Ship, was a Forerunner Keyship.[1][9] The Keyships were a large part of the Forerunner strategy against the Second Human Empire, as they were the only vessels capable of activating the Portal to reach the Ark. One of these Keyships, later known as the Dreadnought, would miraculously survive the Forerunner-Human Empire War to be found and used by the Prophets, and would later become an integral part of the Covenant religion, as well as a power source for the Covenant Holy City, High Charity.