Antidote to Save the World? the Poison I Concocted Spread Throughout the Universe

[Weird apocalypse + dark comedy + pharmacist + system + grams] Liu Busan traveled through time, and at the beginning he inherited a broken pharmacy in a strange world where monsters were rampant. Bite! Abyss Apothecary System Binding! Please prepare a treatment potion for your first patient - the 'androphobic succubus'! Looking at the outrageous material "Succubus's Sincere Tears" on the formula, Liu Mong fell into deep thought. The effects of the potions he refines are always a little... Off: To appease the bloodvine? As a result, it started twerking excitedly! Treat androphobia? Miss Succubus cried and shouted that she wanted to have sex with him! Defense trap? The paralyzing fog lulls the intruder into a strange illusion of happiness! I thought I was just selling counterfeit medicine in the alley, but the medicine was so effective that my reputation gradually grew. Polluted sewers, crying gargoyles, aberrations with flesh and blood stitched together... The orders are getting more and more outrageous. Even followers of the evil god came to the door: "Master, please ask for a bottle of poison that can kill the old god!" Liu Mang: "??? I'm just a medicine seller!" Until that day, the plague of Crow's Nest enveloped the city, and the nobles in the inner city bared their fangs... Liu Mang looked at the bottle of the latest work that shone with ominous light and could corrode the void in his hand, and showed a kind smile: "Perhaps... Adding some ingredients can poison the entire apocalypse?"