Also note that your characters know about a substance called the mist.
It is always there every night, and has been known to make people do crazy things, however people have learned that once the mist has you, your gone for good, for they have found no way to release anyone from it.
They do not know exactly where it comes from, only that it appears each and every night all across the land.
Most are afraid of it and avoid going out at night locking themselves inside, while some venture out into it trying to find it's source, tho non have succeeded, or at least that have ever returned to tell of it.