How mysterious is Hidden Kill Hall?
It is a terrifying force, its existence spanning countless years, seemingly predating the formation of the Nine Countries. This dark-hidden power has long been established.
The Nine Countries have made multiple coordinated attempts to eradicate Hidden Kill Hall, but after each campaign, Hidden Kill Hall resurfaces like stubborn weeds.
To this day, the true size of Hidden Kill Hall and the number of Assassins it harbors remain secrets. Even the Western Moon King, who has connections with Hidden Kill Hall, knows only bits and pieces about it.
The Western Moon King also understands that collaborating with Hidden Kill Hall is akin to dealing with a tiger for its hide, but now that he's on this path, it's difficult to turn back.
