Toxin

"Imae," born to a human father and an Imae mother, endures various persecutions and grows up without ever obtaining a name. One day, the notorious Black Martial Emperor, the merciless king of the Baedal Kingdom, destroys the Imae village. After his beloved mother dies at the hands of the cruel emperor, he is determined to seek revenge, posing as a painter to paint his portrait…(Source: Lezhin US) Note: Includes six extra chapters.