Ophiuchus is the most special existence in the sky - it is the only non-zodiacal constellation that crosses the ecliptic. Like a forgotten traveler, wandering on the edge of the twelve constellations, it is deliberately ignored by the world and not recognized as the "Thirteenth House".
The Greek god of medicine, Asclepius, once used a snake staff in his hand to cure thousands of illnesses in the world and even bring him back to life. However, because he violated the laws of heaven, his body was shattered by Zeus's thunder. When he was dying, he looked at the spiritual snake in his hand that had been with him all his life and made his last wish: "Let the doctor live forever, but every time he heals someone, he must bear the pain." Asclepius turned into Ophiuchus after his death...
People bitten by snake fangs will become "substitute healers" - they will receive the healing power of Asclepius, which can heal wounds and reverse illnesses, but they will also be haunted by eternal curses...
Shen Gong is the chosen "substitute doctor"...
