Black Celestial Book!
As the saying goes, King of the West City, Lord of the Eastern Island, Vajra's Angry Gaze, Black Heaven is ominous.
This thing is no good.
Its principle is based on thirty-one Hidden Veins within the body, through which others inject Inner Strength to practice.
These thirty-six Hidden Veins are named after the Three Stars and Twenty-Eight Constellations, and once practiced, one becomes subject to others.
The practitioner is the Tribulation Slave, and the one who injects Inner Strength is the Tribulation Master.
The force cultivated by the Tribulation Slave is called Tribulation Power, and if overused, it causes intense itching, worse than death, which can only be relieved by the Tribulation Master transferring Inner Strength.
Thus the master and the slave must be inseparable.
This gave rise to the first of the four laws of existence—if the Tribulation Master dies, the Tribulation Slave dies.
