"Although, the area of the far north under my command is broader than that of the Star Forest."
"But... the environment in the far north is too harsh and complex. Many ghosts and beasts even hide deep underground. Even I can't fully feel it."
As the overlord of the far north, the Snow Emperor's mastery of the far north cannot be said to be omniscient.
According to some information about the Snow Emperor himself, there are many spirits of special races living on the cliffs on both sides of many deep canyons in the far north.
Those soul beasts look like stones, but they don't belong to the element type.
...