Monoliths

Monoliths are living planets or moons, typically harnessed by the Shade, although factions like The Ark can do the same.

They range in size from the a twentieth of the size of the Earth's Moon to ten times the size of the Earth. They are hollow, with an artificial gravity source inside. They have multiple purposes: Residential, war machines, and mining. They can devour planets in an hour and filter their resources into their respective types, useful for industry.

They require rooms filled with thousands of volatile Crystals to power.

Shade Usage
They are known to be the Shade's primary weapon of planetary domination. When a species resists, they call one in using a Monolith Beacon.

There have been two known assaults on Earth:

The Alphalith, which was the smallest Monolith type, was called to Earth in the 2040s. However, Gemina nuked its insides and its accompanying fleet before they could call for help. However, the Shade eventually returned.

After the Shade's Crimson Wars, they remembered about Earth, albeit in the 2068s. (Shade time is a lot faster due to chronal anomalies. They went through about 100 years of war first.)

They sent the Omegalith, the largest of its kind, responding to the destruction of a Keyship. However, Gatekeeper used his Infernal Catharsis attack inside its Crystal Room, scorching the inside of the planet, although it was mostly intact. It was claimed by The Ark, and is now New Haven, their own planet. It took the place of Mars in the solar system. Artificial climate control keeps its temperatures even.