Adds a race long time gone called the Orionites. Their abandoned homeworld of Orion has a planetary quality is out of this world. However, it is guarded by a Huge class vessel called 'The Guardian'. The civilization that acquires the planet gains a few Ascension tier technologies.
Available on Nexus Mods: https://www.nexusmods.com/galacticcivilizations3/mods/129
Haven't tested, but the mod should also for with classic GalCiv 3.