Anyone who wishes to enter the Heavenly Dust Ruins to seek treasures must first consume a special pill known as the "Yin Transformation Pill."

This pill has only one effect: it prevents cultivators from being eroded by the endless death aura that permeates the Heavenly Dust Ruins.

Chen Lie also took this pill before coming here.

Whether the endless death aura poses a "threat" to him largely depends on the situation.