Underworld Cave of the Fourth Peak

• In the Primordial Demon Immortal second plane the cave of the fourth peak.
• Within the Underworld Cave was an inexhaustible supply of Underworld Death Sand, which came from the Underworld River. Any Cultivator who entered the Underworld Cave without a powerful body would have their skin shredded off, their blood and muscles ground into a paste, and their bones crushed.
• At the same time, because the Underworld Death Sand was filled with the pinnacle of death, that meant it was also filled with the pinnacle of life. It contained the power to cause one’s Qi and blood to develop with vigor. By practicing cultivation inside the Underworld Cave, it was possible to cause one’s fleshly body to grow stronger and stronger.