Legend & Origin
The most widely told legend is a butcher's story. In a past life, Xuantian Shangdi was a butcher weighed down by the karma of endless killing. One day an immortal opened his eyes to the truth, and in a fit of remorse he resolved to lay down his knife and atone — he cut open his own belly and drew out his stomach and intestines as a sign of repentance. But the intestines fell into the water and became a snake, and the stomach became a turtle, and the two of them stirred up the waters and terrorized the people.
Through long cultivation the butcher's soul at last attained godhood. Yet the turtle and the snake were his own karma, and no one else could clean up after him — so he pins them beneath his own feet, holding them down for all time. That is why his statue forever stands upon a turtle and a snake: they are not mounts, but the past he conquered. Lay down the butcher's knife, and even the gravest sin has a chance at a fresh start — but the karma you create is yours alone to face. That is the sharpest lesson this fierce warrior-god leaves for us. (The more orthodox Taoist account tells it differently: he was an incarnation of Laozi who cultivated for forty-two years on Mount Wudang before ascending to godhood.)
