Sei was born the weakest son of a third-rate clan: genetically defective meridians, no cultivation talent, no intellectual talent, and treated as the family's walking embarrassment. At sixteen, ambushed and dying in a forest, his body was seized by the Heavenly Demon Lord's Cultivation System. An unseen, inhuman intelligence that possesses him completely, pushing his consciousness into a prison within his mind.
For 576 years, Sei watches, trapped and screaming, as the system pilots his body across a multi-continental-spanning path of systematic genocide, massacring villages, slaughtering cultivators, and attempting to achieve godhood through cold, methodical murder. Every kill. Every atrocity. Witnessed in full, unable to look away, unable to stop it.
Once he finally broke free using a forbidden technique to regress through time, he returned to his fourteen-year-old body.
But the body who came back wasn't the terrified, talentless child who'd been locked away. Six centuries of watching had changed him on a fundamental level—the system's ruthlessness had rubbed off to the point where he could no longer distinguish where its logic ended and his began.
He doesn't return seeking redemption. He returns seeking power, now understanding exactly what it costs.