I've Never Seen a Saint who can use Magic so Well - Chapter 55

After being struck by a crazed driver, Eden found himself reincarnated into another world as the last heir of one of the three most powerful clans.Immediately after birth, he was declared a powerful god known as 'Doom'. However, he soon realized that he had been reborn into a world from a novel he had never read, only seen advertised.In this world, evil souls and exorcists existed in secret, hidden from the citizens who lived in ignorance of their presence. Exorcists were born to rid the world of evil souls, maintaining the balance of the world.Eden was born with the power of Doom, and his eyes were meant to be covered at all costs, for anything they gazed upon would meet its demise.Determined to control his power, Eden struggled but failed. Everything changed when the inevitable finally arrived...[Ding! You have obtained the Doom system]A system that shall create the pact for him to tame his power and successfully defeat the evil souls.[Special ability! Host has the special eyes of doom from birth][Ding! Reversing weak aura into......]Eden was reborn with the most chaotic power and it is only a matter of time before we know what this ability shall cause upon this world.

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

The most precious things in the world are priceless. Ordinary men tend to turn a blind eye to this fact. Apart from the treasured air, sunlight, and familial love, there is still one more thing that’s extremely valuable. It’s right beside you and can be easily obtained. But… I wonder whether you can see it?

For the man’s promise, Xiao Chen returned strongly, the bodyguard of the body of the beauty president, sweeping the enemy of all directions, composing the legend of the king!

- Description from Uukanshu (translated)