Saiyan Reborn:The Devil of City Z

He was the universe's greatest hero. He died saving everyone. He woke up as something that doesn't save anyone. Kakarot's soul should have found peace. Instead, a cold, calculating entity intercepted him mid-death and made an offer no Saiyan should ever accept: Be reborn. Grow stronger. But this time — walk the path of the villain. Now he is Kael. A child born into the ruins of City Z, a monster-infested wasteland that the Hero Association abandoned years ago. No memories of his past life. No power. No allies. Only the Villain Ascension System whispering quest objectives in the dark. Only Saiyan blood that grows stronger every time he nearly dies. And only the coldest pair of eyes any ten-year-old has ever had. While heroes train in academies and villains plot in boardrooms, Kael maps monster patrol routes at age three, dismantles a criminal empire at age seven without throwing a single punch, and earns a Demon-Level classification from the Hero Association before he turns fourteen. He doesn't protect people. He owns territory. There's a difference — even if the body count stays the same. But something is cracking in the sky above City Z. The Ki he has been accumulating across fourteen years of survival is tearing a hole between dimensions. And on the other side of that hole, warriors with scouters are pointing their equipment at a Saiyan energy signature coming from a world where Saiyans shouldn't exist. They are coming expecting Kakarot — the weakest Saiyan ever born, forgotten on a backwater planet. What they will find is something that has been waiting. Patiently.