A shaman like man appears out of nowhere and asks if any of the PCs have ever heard of him.
A long forgotten and abandoned mine has been recently rediscovered by a local village.
A large explosion was heard 4 days ago coming from the foot of the nearby mountains. Ever since then no trade wagons have come through as they usually did.
A massive iron key - 2’ length, 20 lbs forged with demonic faces from the bones and horns of demon-lords. When used with a massive portal - carefully built according to documents found in powerful books of evil knowledge, it will open into the realm of demons and allow them to flood into the world. The applications of this item for villains are obvious. Mortals touching this item are subject to [Effects_of_Touching_Powerful_Evil_Artifacts]