The Chairman of Pharmaceutical Company is a Poison King

The Pharmaceutical Chairman is the Absolute Poison Demon | 제약회사 회장님은 절대독마 | O Demônio Supremo do Veneno se torna presidente de uma empresa farmacêutica.

300 years later… On an Earth shrouded in mana. I was a ‘Mana Rejector’—someone for whom that very mana was a deadly poison. Then one day, as I was waiting for death, unable to even Awaken…I connected with an identical soul from another dimension. The soul of the Absolute Ruler of the Murim… The Absolute Poison Demon, Dang Gunak.