Anyone can help me searching for a manhwa? I remember the scene where MC poison tasting with a Tang girl where suddenly someone (from Namgoong iirc) barging in, resulting in him falling ill to the poison. Mc is trying to increase his poison resistence in this scene. He also name the ingredient, refine the poison in his body and excrete it from his finger.
Is this what you're looking for? Reborn as a Scholar. Summary is from MAL. I used to be a ruthless warrior, hated by many and feared by all. My bloodthirsty rampage comes to a life-shattering halt during a fierce battle with a monk, and now I've been reincarnated as Junwoo Hwang, the eldest son of the revered Lord of Suzhou. My new dad wants me to become a great scholar but no amount of studying can take away my love of martial arts and my itch for danger. Will I get to be the powerful warrior I was born to be or will my studies change me from callous to noble?