The Black Rock Moons of Ebaro were moons that orbited planet Ebaro, a Tachyon controlled planet that contained a penal colony known as the Masteze Penal Colony. These moons had little gravity and the moon's terrain consisted of nothing but black rocks. These moons contain ill-tempered creatures known as Gravoids, large balloon floating insects. Ephemeris raided these moons for Gravoids to serve the Loki as vessels.