The Blood Beast, while originally a construct, has surpassed its beginnings to assume a place of infamy.
The Mihradhz shrieked, with a sound like fingernails on slate, as it was dragged headlong into our world by a greedy and uncaring spellcaster whose only desire was to defeat his rivals.
Perhaps the most destructive of Kel’Regar weapons, Summer’s Extinguisher plunges the world it is deployed on into a deep and permanent winter.
Hiding deep within catacombs of the ancients, in low, deep alcoves where they lie, spider-like, awaiting the taste of fresh blood, there are the hideous Torlakia, dark beings who once lived and are now, fearfully, undead.
A little way up the narrow valley, before they reach the woods, the PCs notice the squat, tumbledown buildings by the riverside. They are hardly big enough for a human to stand in, and the complex cogs and shafts that occupy the central cavity of one of the buildings are perplexing. What were these buildings? And how safe are they to explore?
Alternatively a desolate place is the perfect setting for a derelict chapel or croft. There needn't be any actual physical encounter involved, but it adds atmosphere to a place to see its dead history. For instance, in the Outer Hebrides there are whole deserted villages which were razed to the ground by the English during the Clearances. Such stories give a setting authenticity and character.