Weird and Fantasy, from Mortals to Indescribable Saints

[Cthulhu, all races in the world, strange martial arts, upgrade flow] Jingxu Immortal Dynasty, Shenlie 3901. The human race is in chaos, and the people are in dire straits. The common people of the human race are treated as pigs and dogs, and the monks regard them as food. The rituals and music of the Immortal Dynasty have collapsed, fathers cannibalize their sons, sons cannibalize their mothers, and so on can be seen everywhere. In the last years of the dynasty, all the tribes from all over the world came with the evil sect, intending to exterminate the human race. Warlords from all walks of life have emerged, separatist regimes, evil cults and chaotic parties are raging, and people are in ruins. Various strange natural disasters are coming: faceless fog, tide of oblivion, babbling plague, falling creeping stars, silent zone, living soil, and rule distortion. There are also countless monsters running rampant, weird things happening, gods and ghosts living together, indescribable strange things, or mysterious phenomena that cannot be understood. In this dark and chaotic world, Zhou Ziren opened his eyes and found that he was tied to the beheading platform and was about to be beheaded...?