In Ancient Quatria, there was a secret castle located within the ring of mountains which guard the entrance to the Hypogeum.

Gate of the Secret Castle of Quatria

Knowledge of this Secret Castle was forbidden to all those entities who do not have the right or the means to traverse the worlds.

Many magical beasts and therianthropic magicians populate and pass through the environs of this castle on their way into, out of, or around the Hypogeum as part of their ritual pilgrimage and circumambulations.

Among those denizens, which are known through the scant and secret tales passed to outsiders, are said to be the alpaga (common to all of Quatria and its colonies), the landwhale, and the eohippus or so-called “dawn horse.”