MTL - Becoming the Villainess: I Reign Over the Cultivators’ Realm With My Wok! - Chapter 200 second prince

Being given a chance and reincarnated is nice and all, yet why do I have to become that male friend who just watches the protagonist flirting with his harem?---World: Kaguya-sama: Love Is War - Hyouka ----

A letter to break off the engagement leads Ling Family in Tangyang to endless doom. And he, Ling Zhang, is tortured to death after his legs are cruelly broken.

Every person is born different; all of creation has a hundred faces.Some are born foolish, some are born wise. Some are extraordinarily gifted, while others are hopelessly mediocre.Yi Beidou was born a demon.But he was lucky. He met his master, Hong Datong, who taught him the “Free Heart Technique.”With 7 needles in his body for 20 years, he has finally been able to control himself.“For twenty years, I kept my head bowed and my nature restrained. Today, I can finally raise my eyes to see the world and truly be myself.”

In this world, orphans or just anyone without any hope for this world can apply to become a “walking target”. Their sole purpose is to be a practicing dummy for the students of the sect who train to become “Demon Hunters”. These students need “walking targets” to test their training on living, walking beings of flesh and blood.
In exchange, they will be provided with food & shelter.
Their existence value is lower than a slave, but if they manage to survive a few years they can receive a life long pension.

Xiao Han is such a “walking target”. One time he witnessed a powerful Demon Hunter disposing a demon. When the demon died, a fragment of the demon that managed to escape entered Xiao Han’s heart. No one saw that, and even Xiao Han himself only felt some discomfort for an instant.

But that thing in his heart soon gave Xiao Han visions, and the first one is of a cultivation method which allows Xiao Han to absorb damage to enhance his body. A perfect cultivation method for a “walking target”.

- Description from Novelupdates