A (fairly sketchy) outline of a one-off adventure I ran based around the (time-honoured/hackneyed) Tunguska Event of 1908. As such it is quite specific (hopefully not hackneyed) and will probably best serve as a specimen for dissection to get those parts you can use in your own adventures. But then this is an Ideas Guild after all...

Only a year before, King Stymian’s future was firmly in his grasp. Today, he struggles for his own kingdom. But of all things, he is not a man that yields to opposition.

I’ll tell you something, there was a demon in Widow Suvar’s Wine cellar. How do I know, ‘cuz I seen it that’s how I know.

Near the summit of mount Arak’nui, the remnants of the elven race still lingers. Their hearts darkened, their spirits broken, they have turned to evil and embraced demon-worship.

Darkness and bitterness has consumed them, and they have turned away from their gods and summoned demons to inhabit the flesh and souls of the willing. Shadow dancers these elves are called, and they are an instrument of revenge, wreaking havoc wherever they dance into the midst of the enemy. It was an alliance hastily made in those desperate days three centuries ago, but as the elves witnessed the agony and change visited upon the shadowdancers they regret the decision more and more.

A young girl, of fifteen, sets out to find the kingdom of her land after raiders burned down her house. Now she has met a wonderful friend who schools her in the ways of the land…

In a nearby town villagers tell tales of adventurers being driven mad by an unknown force within the woods…