Houtu transformed herself into the cycle of reincarnation, drawing forth the Netherworld Great World, becoming a Saint within the Primordial, wielding both the Book of Life and Death and the Judge's Pen, two Top-grade Innate Spiritual Treasures.
Since the teachings of Daoist Ancestor Hong Jun, Houtu has been the only being in the Primordial who cultivated the Immortal Dao and became a Saint of Merit without relying on the Hongmeng Purple Qi.
Yes, the only one.
Demon Ancestor Luo Hou and Emperor Jun, although both possess the strength of Saints, they did not cultivate the Immortal Dao laid out by Daoist Ancestor Hong Jun.
However, Houtu Ancestor Witch, although having become a Saint through Merit, went on to cultivate the Immortal Dao as taught by Daoist Ancestor Hong Jun after the Merit helped her solidify her Primordial Spirit.
This point, all beings within the Blood Sea could sense.