Rats Cultivate Immortality: Starting from the Drug-Testing Rat, Seeking Good Fortune and Avoiding Misfortune

It's quite a rush to travel through time. He has not become a peerless genius, nor has he become the ancestor of the Immortal Sect. I became a black and white drug test rat in the potion furnace of casual cultivators. As soon as he opened his eyes, he was force-fed a bottle of green poison by a half-dead old man. He was feeling feverish all over, vomiting blood, and was about to die on the spot. Fortunately, I have an extra piece of "golden paper" in my mind. Three fortunes are automatically refreshed every week. [Big ominous: At midnight tonight, you will be thrown into a mass grave and eaten by wild beasts. [Little Evil: If you leave it in the medicine furnace, it will be turned into waste tomorrow. [Xiaoji: Three feet east of the mass grave, there is a saprophyte plant growing with it. Taking it can detoxify hundreds of poisons. Is this still a choice? Suddenly looking back, how could I, a mortal rat, become an immortal?