The Sunken Temple

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Located in the lowlands, the Sunken Temple is home to the Proteans, ancient chthonic being(s).

Proteans
They are eldritch horrors from beyond time and space, represented by Mother. They have the ability to absorb the dragon's captives, and are a dreaded force on the battlefield. According to themselves, they were before the universe began, with Mother being the progenitor of the Sun and the Moon. They now seek to reabsorb the material universe, and remake all in their own image.