The Golem Wars are over now. There is a great peace around the world, but something evil and powerfull has been awakened in the darkness.
A PC awakes in a cell plastered with blood. On the floor lies a crucifix necklace. She escapes, chased by the guards and soon the terrible truth of her situation dawns on her…
The heroes find a small crypt somewhere and being brave adventurers they want to check it for evil forces (=graverobbing). Or for any other reason.
In a village the characters hear rumors of a man that recently came through screaming of demon attacks and murderous insects.
In one region of a forest, all of the trees are identical, down to the leaves and the twigs. If the PCs carve something into one of the trees, it could mystically propigate until it covered all of the trees, or could vanish since it was not carved into the one true tree.