Once upon a time, around 30 years ago there was an orphanage by a big forest.
The forest wasn't without danger, and to prevent accidents from occurring the patrons from the orphanage warned them with a myth...
"Do not go to far into the forest or else the nokken will lure you with his violin and drag you into the stream!"
Afraid of the mythical creature none of the children ever went into the forest.
not a single drowning accident took place for a very long time.
but what the adults didn't, know was that the nokken was actually real.