An ominous emblem begins appearing in tapestries, paintings, engravings, streets, etc. across the town or city in which the players are staying.
While enjoying a meal in the local tavern, the party strikes up a conversation with another customer, who is witty and urbane.
A sorcerer with evil intentions or just a murderer waiting for another fool?
At a crossroads, the characters come across a trio of thick poles set into the ground, just outside the overlapping roads.
An obviously wealthy and beautiful woman contracts the PC’s to solve a missing persons case. The missing person is her younger sibling, a teenage boy.
Atop a nearby rise the infuriated priestess stood, taking in the unfolding scene in the
valley below. How dare these metallic, roaring, foreigners loot their temples. She offered
up a silent, vengeful prayer to her gods, may their wrath befall these intruders!
Why do they choose to re-appear now? Perhaps it is just a crazed local? What will happen to the child?
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...