From the Start, I Was Possessed, So I Refined Ten Thousand Corpses Into Clones

A corpse-handling servant at the third level of Qi Refining is forcibly possessed by a vicious Foundation Establishment cultivator.

At the brink of death, his ancestral Profound Yin Calamity Bones awaken. The vicious spirit is drained dry and refined on the spot, and the Profound Yin Soul-Splitting Art is etched directly into his sea of consciousness.

Others control corpses when they practice corpse refinement. He splits his soul and enters a corpse, turning each corpse puppet into a living doppelganger.

They retain their original owner's memories, can speak normally, and lose none of their cultivation. No one can see through them, even face-to-face.

The inner sect senior brother who bullied him dies a gruesome death, then returns as his clone, carrying on with his duties and collecting his stipend.

A powerful cultivator from a rival sect dies in battle, then slips into the upper ranks of his own sect under a new identity, undetected.

He defeats a genius of the righteous path and earns a generous reward from the Grandmaster of Demonic Cultivation.

He slays a prodigy of the demonic sect and seizes a rare treasure from the righteous path.

Only when the sect finally realizes what is happening do they discover, to their horror:

all the fellow disciples around them and all the mortal enemies across from them are Mo Chen.