"Xuantian Supreme Scripture" was created by a predecessor of the Xuantian Holy Sect. Although this predecessor could not cultivate, he was still a rare genius of his time, creating the Quasi-Emperor level "Xuantian Supreme Scripture."
To cultivate to the level of an Immortal Emperor, one must practice Emperor Level cultivation techniques, but in the entire Cultivation World, apart from the deeply-rooted Tai Xu Immortal Palace, which has produced several Immortal Emperor level powerhouses, many Emperor Level cultivation techniques have been left behind.
However, for other sects, Emperor Level cultivation techniques are exceedingly rare. Even though the Xuantian Holy Sect is second only to the Tai Xu Immortal Palace in the Cultivation World, it still lacks Emperor Level cultivation techniques, with the sole exception being the "Xuantian Supreme Scripture!"
