As of my last update, Undead Gamja is a pen name for an author best known for their work in the webtoon and web novel genres. They gained popularity as the writer of "Tomb Raider King," a web novel that has been adapted into a webtoon. The story involves themes of tomb raiding, adventure, and supernatural elements. Undead Gamja's real identity, personal history, and full portfolio of work are not widely publicized. If you're looking for the most current and detailed information about the author, I would recommend checking out the latest updates on web novel communities or platforms where their work is officially published.