Black Tortoise Guild

In the revised timeline, this Seoul-based organization counts as a fairly large body of hunters. Although its standing falls short of the celebrated White Tiger Guild or the Fiend Guild, it still enjoys broad recognition across Korea and maintains an ongoing rivalry with the White Tiger Guild. The public assumed its name came from the Four Guardian Beasts, but the truth is simpler: the word 'Hyunmoo', Korean for the black turtle-snake, was lifted straight from the name of its master, Hyeonmoo Gang, rather than from the mythological set.

As one of Korea's larger guilds, the organization pursues gate raids and dungeon clears across the country while jockeying for position against its rivals. In the novel it twice attempted to bring Sung Suho into its fold, first courting him right after he awakened as an E-Rank hunter, and again once he had reached C-Rank, this time with scouts hounding him outside his home and drones spying on him. The guild later sought an endorsement from Ahjin Soft for a game project, and its master tried to win Suho over after learning he was Yoo Jinho's nephew. When Suho raised the matter of the surveillance drones, Jinho grew furious and blacklisted the guild.

The guild is led by Hyeonmoo Gang, an S-Rank hunter who remains alive, and it is from his name that the organization draws its title. Among its other figures was Lee Yeongho, a B-Rank hunter who served as the chief of the Second Management Division and has since died. After the blacklisting, some members held a grudge against Suho and, acting without their master's blessing, tried to kill him; the attempt collapsed and every participant died. Jinho eventually lifted the blacklist to secure the five S-Rank endorsements needed for his nephew to clear the North Korean field dungeons.