Supreme Lord of the Dark Heaven
"Xuan Tian Shang Ti, The Supreme Lord of the Dark Heaven, was originally a butcher, he had killed a lot as days passed he felt remorse for his sins and repents by giving up butchery and retired to a remote mountain for cultivation of the Tao. One day while he was assisting a woman in labor, while cleaning the woman’s blood stained clothes along a river, the words “Xuan Tian Shang Di” (玄 天 上 帝) appeared before him. The woman in labor turns out to be Guan Yin manifestation. To redeem his sins, he dug out his own stomach and intestines and washes it in the river. The river turns into dark murky water then after a while it changes the water into clear pure water.
Unfortunately he loses the stomach and intestines while he was washing it in the river. The Jade Emperor was moved by his sincerity and determination to clear his sins; hence he became an Immortal known as “Xuan Tian Shang Ti”.
After he becomes an immortal his stomach and intestines after absorbing the world essences it was transformed into a demonic turtle and snake harming people. No one could subdue them. Eventually Xuan Tian Shang Ti returns back to earth to subdue them and use them as his transportation or disciples.
Xuan Tian Shang Ti is portrayed as a warrior in imperial robes, the left hand holds the “three mountain mudra” while the right hand holds a prominent sword. He is usually seated on a throne with the right stepping on the snake and left leg extended stepping on the turtle. His face is red with long flowing black beards, looks very stern with bulging pair of eyes. His birthday is celebrated on the third day of third lunar month."