Naruto: Konoha's Kanpu - Chapter 3: Chakra Refining Technique

Entering the world of cultivation, Brandon Jiang thought he was stepping onto the path of immortality, but little did he know, he was actually walking a path of death!An immortal once said, “If you are not at the dining table, then you are inevitably on the dining table.”Humans are the spirits of all living things, endowed with natural dao embryos and the great medicine of heaven and earth.In this world of cultivation, only by absorbing others' abilities and fortunes can one cultivate!Therefore, mortals are raised as Sacrificial Furnaces.If you don't absorb others, others will absorb you.Brandon Jiang is unwilling to become a Sacrificial Furnace, nor does he want to commit heinous acts.Until the fairy who loved him died in his arms, Brandon Jiang was driven completely mad.Many years later, when Brandon Jiang looked back, he realized that he had become the most ruthless demon in the world.

The world ended.Zombies and monsters rose. Cities crumbled.And Merek? He woke up in the apocalypse with a job that lets him create armor for lingering souls—spirits without bodies, desperate for purpose.Turns out, the dead don’t rest easy. Some are angry. Some vengeful. Others? Just lost. When Merek binds them into steel warframes, they don’t just fight... they evolve.Now, he leads a legion of the undead—ghosts in armor, bound to him by oath and fate.Faction leaders call him mad. Warlords want him dead. And God? If He’s watching, He’s not talking.Merek was supposed to die with everyone else.Instead, he got a support type job no one’s heard of... and a shot at rewriting his pathetic Earth-life.In this world, only the fittest survive.And Merek? He’s got undeads in steel at his side.

Once upon a time, there was a beauty who met nonstop misfortune. This unfortunate man hurried to hug a golden thigh…

Coming from the end of days, the ‘excluding eating there’s only eating in his brain’ Little Useless Eater transmigrated to a ghost story world where it’s difficult to preserve his life. Good that, not only does his IQ explode the meter, all attribute points are also entirely placed on his face, letting him rely on his otherworldly beauty to find a thick and sturdy big golden thigh. Hugging from world to world, finally, from a pitiful thing being oppressed by demons and monsters on every path, he evolved into a vexatious ghost!

- Description from Novelupdates

Having lived a normal life all his life and died without being able to fulfill his desire and when he’s given a task by a god, watch how he takes the protagonists girls while making it hard for the hero.