The next stage in the Primordial Spirit Realm is the Three Immortal Soul Stage. The Soul consists of the Three Immortal Souls (Hun Souls) and Seven Physical Souls (Po Souls). The physical soul is the yin in nature and controls the body–including the five internal organs and Nine Orifices. The Po souls governed health or the body's instincts to fight diseases.
For example, the "Thief Swallower" is the Po soul that regulates the body's immune system. The "Flying Poison" controls the body temperature, and the "Hidden Arrow" controls digestion.
In the Primordial Spirit Realm, it is the turn of the Three Immortal Souls: [The Secret Spirit], [The Fetus's Light], and the [Bright Spirit].
Wang Wei focused intensely on his Primordial Spirit, entering a profound state of meditation. He reflected on himself, his actions, motives, and goals in life.
And at some point, he discovered three threads connected from his Primordial Spirit to three illusory figures of himself. Numerous colors surrounded the first figure while rotating around him. Each color represented a different emotion: this was the [Secret Spirit], It determined a person's mood, likes and dislikes, and what kind of person they attracted to–both romantically and platonically. In general, this part of the soul correlates to people's emotions and how they change or manifest when interacting with others. 'This Immortal Soul might also be connected to Karma. Using it, I could make someone falls in love with another person and connect them through Karma.'
He then looked at the second illusory figure of him. It had the number [6, 345, 921] on top of its head: This was the [Fetus's Light], the source of life force, and the number on top is Wang Wei's current life span.
Finally, he looked at the last figure, which was entirely purple. However, he quickly noticed another odd thing besides the color: it had chains all over its body. The [Bright Spirit Soul] controlled intelligence, wisdom, and creativity: This is the primary source determining a cultivator's comprehension. Any changes in it could positively and negatively affect the intellect.