The Aparoid Mortar is something like a stationary version of the Dragoon, but glows a bright blue, and its "Roots" look more like rudimentary legs, as ther are six of them. They have two arc shaped arms to generate plasma torpedoes, and they can do considerable damage. In levels such as Meteo and the Homeworld core, they fire bright green lasers, and are obviously weaker than their ground counterparts