Good Medicine Jianghu

Le Luyan, a noble scion suffering from a terminal illness, decides to roam the martial world in the final days of his life. To his surprise, he discovers that the blood of a wandering hero named Mu Ran holds the power to cure him. A decadent nobleman ravaged by a deadly disease and poison, and a martial hero whose blood is a panacea and whose body seems indestructible, they become entangled in the open and hidden struggles of the martial world, all centered around the miraculous potion known as the Exquisite Elixir.

(Source: Bilibili, translated)

Note: Chapter count includes 3 extras.