One of the preeminent occult scholars of the Cosmic Era, well versed in ancient mysteries, and one of the hidden masters manipulating the Cosmic Era.
Each new home prides itself on its idol and as each new home receives its idol, the power within them grows, glows and connects. ...They are the bringers of wonderment and gifts but little do the townsfolk know, for the Shithiran are the takers of everything.
Pnathic sorcery has existed for ages, crudely used by magi who no idea the true forces they were fumbling with.
"a new (scientific) truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die, and a new generation grows up that is familiar with it."
With a huge number of sacrificial victims, another realm long ago secretly bound a Prince of the land spirits, Iorstonn by name, thus ensuring the fertility, and improving the magical defences, of their realm. But binding that Prince to one spot has disrupted the weather and magical patterns (ley lines?) over half the continent. Things have become bad enough that a coalition has been formed to rectify the situation, once divinations have established the cause.
Your party is one of the teams assembled to do the rectification: find the binding object and steal it ("so that we can destroy it here in our realm, of course"...*) or destroy it over there. Presumably the Prince will be grateful to his rescuers and angry at the binders, but with a greater spirit like Iorstonn one can never be sure: such beings are "tricksy".
* Of course, the rulers of our realm might want to control Iorstonn for their own ends...