MTL - Start with a Mechanical Hunter - Chapter 49 Biomodification (below)

Song Fengwan was dumped by her fiancé, who had been dating her for a year, and an illegitimate daughter appeared out of nowhere to ruin her family.

Chen Shen traveled to a world of immortals and became the corpse collector of the Xianzong, burying the dead disciples every day.

To bury the disciples of the seventh level of Qi training, to obtain their immortal skills and experience, and to obtain part of their spiritual roots.

To bury the disciples of Daofeng’s inner disciples in the array, get the spirit-gathering array, the killing array, and the experience of the array.

Bury alchemy masters, get Peiyuan alchemy recipes, build foundation alchemy recipes, and get alchemy master experience packs.

Bury super geniuses, complete spiritual roots, and achieve heavenly spiritual roots…

Twenty years later, Chen Shen, the body collector who has grown into a Jindan Zhenjun but is still low-key, discovered that the corpses sent this time were unusual, as if they were from the whole sect!

- Description from novelbuddy

Humans across the world ended up joining a “Demon Kings and Heroes game”.

Several billion people were set down upon another world to act as “Demon Kings” and “Heroes”. Everyone has to chose their starting races from the start.

Zhang Nu was set in the Demon King camp.

He discovered that he could see hidden information that no one else could.
[Slime Demon King]. Low grade demon king bloodline… Not recommended!
[Kobold Demon King]. Low grade demon king bloodline… Not recommended!
[Dark Elf Demon King]. Mid grade demon king bloodline… Can be selected!
[Bloody Giant Demon King]. High grade demon king bloodline… Recommended!
[Abyssal Dragon Demon King]. Strongest starting bloodline… Extremely recommended!