Huang Hei ya, an organization founded by sylvina, is active as a mountain bandit group in the misty mountains. Over the past few years, Huang Hei Ya has committed a lot of huge cases, which is famous among the city states on the South Bank of the Lushui River. Every caravan that wants to pass through the misty mountains must be alert to the presence of the black teeth. On more than one occasion, the chamber of Commerce and the city-state sent a crusade army to attack the mountain bandits in the misty mountains, but most of them failed in the hands of Huang Hei Ya led by sylvina. It is for this reason that this small group of mountain bandits has become more and more famous, and its core personnel reward list is also on the list of major city states. The dark queen, sylvina, is undoubtedly the most famous of the members, appearing at the top of the reward list.