Drug-Eating Genius Mage

Drug-Eating Genius Mage is a Manga/Manhwa/Manhua in (English/Raw) language, Action Adventure series, english chapters have been translated and you can read them here. You are reading chapters on ManhwaZ fastest updating comic site. The Summary is

[By the studio that brought you and !] Having reached his talent limit on magic, the protagonist was sent to the gaming world as punishment — to a huge city named Valkan. In order to survive, he builds relationships with other people and investigates the secret behind the “closed world”, striving to prevent the end of the world.