To do: a proposal, not in the game.

Seat: the painted caves of the Hexi desert. Ochre and dark violet, a closed eye. They are not of the Cult; the Cult tolerates them because it fears what they keep.

Its art is the Devouring Demon Art: rage, four tentacles, the demon form. Designed, not in the game yet.

Legends

• The second coffin. In the desert tomb there were two coffins. The first Heavenly Demon opened the first and took the blood arts from it. He looked into the second, closed it, and ordered the Ku never to open it. The Devouring Demon Art was inside.
• The one who ate himself. A Ku opened it anyway, a hundred years ago. The art made him invincible, then hungry. When he had no enemies left, he devoured himself. His tentacles would still be in the deepest cave, and they move.

Heritage (planned)

Legendary passive: The Hunger.