At first, Su Zhou had thought it was simply a matter of being 'called,' similar to how Evil Demons are born. But in reality, when the Leaders of the Spirit Summoning Association had their Awakenings, Spiritual Qi had yet to be restored. How could there have been so many callings!
There had to be some kind of trigger. Something that could take those who were born abnormal—'potential monsters' who already shared a certain similarity to the tides of thought of some Great Beings—and, after being stimulated, turn them into true Monsters!
