The Extreme Alchemist of the Mighty Cauldron - Chapter 1762 - 1859: The Great Chaos

It was a dangerous era. Extraterritorial ferocious beasts occupied 90% of the living space in the world, while humans could only survive in a small space. Fortunately, some of the surviving humans awakened to genetic martial arts! Breaking the shackles of one’s genetics was the foundation of cultivating martial arts. Lin Feng, who was born with congenital disease, could not experience a breakthrough. However, by some fateful encounter, he awakened to the ability to merge genes.

I exist in the darkness, disappear under the bright light, and will eventually devour the sun and turn into the shadow of all things… Known by people as the indescribable terror of darkness; the king of shadows; the dark day; the existence of the shadow of the world , is still just a somewhat special high school student, facing a weird death game…

- Description from novelbuddy

Daiki Tsukasa transmigrates to a world of everyday anime crossovers.At the start, he purchases a Special-Grade Cursed Object, activating the Great Collector System.As long as he collects valuable items, he can receive rewards.『 Congratulations, host, for collecting the Special-Grade Cursed Object — Sukuna's Finger. Reward: Innate Domain — Malevolent Shrine! 』『 Congratulations, host, for collecting the Yukinoshita Family. Triggered Triple Bond. Reward: Immortal Dual Cultivation Technique! 』...Miku Nakano: I was here first! Get lost, you vixen!Yukino Yukinoshita: Could you stay away from my sister?!Iroha Isshiki: Senpai! You won't abandon your cute kōhai, right?۞۞۞T/N: Be advised that characters and powers will be used, but not necessarily in the exact order, logic, manner, or arrangement that occurs in the original. Some stories will obviously be changed to fit into this mixed world with so many characters.