King Arthur and the Grimoire of Lust - 1

It's been centuries since the last great war with the demons. The monks of Avalon could not defeat all the demons as there were too many of them so they did the next best thing and sealed their access to the human world via the Grimoire. It was said that the Grimoire was left in the human world by the dark lord himself as a gateway, it was an immortal object that cannot be destroyed as it exists in both the human and demon world. The peace that everyone took for granted will soon come to an end as the magic sealing the Grimoire's power has weakened over the centuries and the world has changed. No one has heard of let alone encountered magical or demonic creatures since the war. The use of magic was all but a lost art. Even the monks who had sworn to guard the sealed demonic gateway have become complacent. After his failed attempt to invade the human world by brute force the dark lord had decided to keep a low profile this time and sent his succubus Lilith to lead this invasion. The grimoire glowed as its contents rewrote itself into rituals for summoning demons of lust and spells to fulfill ones desires.