Death of a murderer

Once upon a time there was a greatest killer in the ancient world.he was in the level of supreme immortal. He never failed to kill a target.At the last mission he was told to kill an heavenly Immortal Emperor. He fought with his full power but failed to kill him.

At last he was killed by the heavenly immortal emperor. His soul was about to disappear.But he has a treasure called heavenly demonic death law. it keep his soul from disappearing. it turns his soul into heavenly death spirit.

Heavenly death spirit is a spirit that can Devaour other sprit.