MTL - Weak A, She Just Wants To Live To the End - Chapter 125

This is a world shrouded in darkness, and the pervasive black mist erodes all living beings.

Only fire can dispel the darkness and protect mankind.

But the firewood will eventually run out, the fire will eventually go out, and humanity will eventually perish.

until Rhodes came.

- Description from novelbuddy

It was only after Su Yayan's death that she realized that she was a malicious cannon fodder female character who became a scapegoat in a Mary Sue story.

“Come not between the Dragon and his Wrath.” — William Shakespeare The year was 2140, and Earth was nothing but a distant memory. Humanity now drifted through the galaxies aboard colossal ARKs, massive skyships that served as the last bastions of civilization. Yet, these ARKs were more than just floating cities; they were humanity’s last containers, preserving what remained of their species. A century before Earth’s final collapse, humanity discovered a gateway to a realm known as Eternia — a fantastical world straight out of myth and legend. Reaching this realm required more than just advanced technology; it demanded a complete departure from the physical body and entry into a mysterious process known as the Dream Weave. In the present day, Cloud lived aboard ARK NO. 427, where he had been training from a young age to step into the Dream Weave. He was a standout among his peers, excelling in every tasks that came his way. Everything seemed to be on track for him — until the pivotal day of the Class Selection process.

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