The D.S. started out as something nice. Our own body fights against the Nightmarecourt and introduced the D.S. It originally was used to cut out and disturb nightmares. The fault lay in them not understanding, what a nightmare is - they scramble up everything and eat parts of nice dreams.
How to fight it
Not dangerous and even beneficial, if they actually go for nightmares. If you want to get rid of them, start writing down your dreams - maticiously! Your body will learn, that you like to keep your head in order. gab