One of the Four Forces in the Manhwa. The Neutral Force are divided into four forces, with each clan being positioned according to their corresponding direction in Murim: North Sea, South Forest, West Desert & East Mountain. The leader of each force makes up Neutral Force's Elite Four, including: Dan Wu-Hyeon the King of the Northern Ice Castle, Salsung and Goddess from East Mountain, & the King of Nam-Lin Yasujok (Wild Animal Tribe) from South Forest Hwang Keon Woo.
As suggested by their name, they generally do not meddle in the affairs of Murim unless given a significant impetus to act for or against another of the Four Forces. So far, only three out of four forces have been introduced in the Manhwa: the North, the East and the South.
The East Mountains later serve as an important choke point against Sinji.
Activity in MurimEdit
The activity of the Northern Ice Castle has generally been limited to the actions of leader Dan Wu-Hyeon. After encountering Bi Kwang and believing in his account of an alleged affair involving his daughter Bu Young, he has maintained contact with Black Force in appreciation of their fabricated relationship. A specific example of this would be Wu-Hyeon's visit to Bi Kwang during the latter's battle with Chun Oon-ak, in order to voice his support for his supposed son-in-law.