Thousands of years ago humanity was almost wiped out by the nightly attacks of coreling demons, and saved at the last by the discovery of wards which turned the magical power of the demons back upon themselves. The monsters crept back to the centre of the planet, to regroup, recuperate and procreate while humans slowly forgot about them. Eventually many thought the demons nothing but pub tales, so their Return (it is always capitalised) three centuries ago came as an unwelcome surprise.
