I Am A Gourmet: Just Eight And You Want Me To Start A Roadside Stall? - Chapter 49 - The Key to the Crab Taste

Traveling through the troubled times, the strong are born, and the dangers are everywhere.

Lu Wangchuan found that as long as he consumed a certain amount of energy and blood, he could directly improve the level of his skills.

Consume 1,000 calories of energy and blood, and complete the Cracking Mountain Fist to open the monument and crack the stone.

Consume 10,000 calories of energy and blood, and cut the river with one sword at the full level of Wuji Swordsmanship.

Consume 100,000 calories of energy and blood, and destroy 100,000 enemies instantly with the ultimate Prajna Dragon Elephant!

…

Time flies, when the energy and blood exceeds a trillion trillion, Lu Wangchuan suppresses the sky with one thought, and destroys the gods with one word!

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- Description from novelbuddy

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 world is terrorized by the powerful Black Witch who has been sealed in the moon. Every ten years, the night of Hexennacht arrives and a chosen witch must battle the Black Witch in hopes of finally defeating her.

As the current decade’s Hexennacht approaches, a mysterious girl named Kagami Kagami arrives and meets Horinouchi Mitsuru, the daughter of the previous Hexennacht representative.

It takes place between Kyoukai Senjou no Horizon and the City Series, two other series by the author.