Mass Effect & Mass Effect 3
During the initial survey of the Anataeus system, only a single fly-by probe was spared for the small, scorched world of Ageko. It revealed a planet unusually high in heavier elements, given its size.
Ageko is a standard terrestrial with a thin atmosphere of krypton and xenon. Its crust is mainly composed of magnesium with deposits of cobalt and other heavy metals. Due to extremely rough, cratered terrain, starships are discouraged from landing.