Abyss Shepherd

The weakest monster, the strongest ranch! When awakening, "it" is just a nameless black mist on the 137th layer of the abyss. No limbs, no core, no intelligence - even the lowest level of abyss worms can devour it. Its only ability is "pollution". Creatures touched by it will slowly mutate in completely random directions. The vast majority of mutants will die within a few abyssal days - they mutate out of control, their organs eat each other, and eventually turn into a pile of debris. But it discovered one thing: if you control the timing, location, and intensity of contact, the direction of variation can be steered. So the most ridiculous undertaking in the history of the abyss began - a black mist opened a pasture. Starting from raising abyss worms in captivity, it has been screened, cultivated and improved from generation to generation. Stronger shell, more efficient digestive system, more stable reproductive ability. The pasture expanded from a rock crevice to an entire abandoned cave, and more than a dozen mutant branches developed from a single worm species. And it itself always maintains the weakest form of black mist. Because in the abyss, being noticed means death. When the products of the ranch began to invade the territories of other levels, those ancient beings that had ruled the abyss for tens of millions of years finally turned their attention to the mutations coming from the lowest level.