Sword Mountain Purgatory is a special setup embedded in the Divine Stone Array, where a small space is ingeniously carved out within the array.
The Emperor's Long Saber, refined by Tong Dabao, is placed in this small space.
In usual times...
Sword Mountain Purgatory is used to intimidate everyone on Celestial Child Divine Island. Anyone who dares to defy the rules set by Tong Dabao is thrown into Sword Mountain Purgatory for severe punishment.
In case of an emergency, Sword Mountain Purgatory will merge with the Divine Stone Array.
The Divine Stone Array primarily focuses on defense.
Sword Mountain Purgatory primarily focuses on attack.
Thus, forming a seamless attack and defense system that makes Celestial Child Divine Island impregnable. Even a Great Emperor would have a hard time breaking in immediately.
