Spheres

Titans floating in the Expanse, the Spheres carry whole civilisation in their large membrane. Coming in various shapes and demeanor, they live in symbiosis with their inhabitants. It was all that remained from the ancient ones after the Apocalypse, and saved the crumbling societies from sinking down the dark Abyss. No intelligent life would be able to prevail without them. Mind controlled by armies of Spheriers, they are vessels of their people's endless journey across the void of the Ocean.