Pharmacist? No, Please Call Me Master Alchemist

After the extremely cold plague froze the body of the last territorial citizen, red fire lit up in the dilapidated small castle. "A few cave spider eyes, a little black swamp poison dart frog saliva, a screaming mushroom from the terrifying forest, and a little accumulated ashes from the stove, you can fight poison with poison and create a potion to cure the disease!" Under the dim candlelight, Norn Nightingale kept flipping through the strange books on the table. "Bang!" Once again he failed. The dripping blood solidified into scarlet ice crystals before they even touched the ground - the calamity and cold epidemic had already penetrated his bone marrow. "Maybe this isn't just an epidemic!" "I should add some magic, and,,, miracles!"