What Should I Do If I Wake up Surrounded by Monsters?

This is an extremely strange world. Demons and evil spirits coexist, lurking in human bodies, and eyeing all living life. There are evil gods above the nine heavens watching the world, and taboos are awakening under the underworld. Humanity in this world seems to be in danger. And the young man Lu Xuan came to this world after waking up. By chance, a random system was bound to it, and you can get a random reward every day. The first reward he received was the legendary Eye of Yin and Yang. But when he opened his eyes, he found that demons were everywhere in his life. The peaceful county town in the past had suddenly turned into a feeding ground for demons. What should I do to... Survive? Ps: Weird and strange + mythical background + dark and cold + semi-invincible flow = the introduction is weak, readers are asked to move to the main text. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.