Underworld System: Becoming Invincible After Saving One Hundred Thousand Wrong Souls

Sudden accidental death, I am bound to the underworld salvation system! By saving the souls of enemies, you can break through the realm and become invincible all the way! Ghost soldiers, ghost generals, ghost kings, ghost emperors, come and save each one! When all one hundred thousand innocent souls are saved, I dominate both the Yin and Yang realms, and all ghosts bow their heads, becoming the ultimate nightmare in the world!