The Immortal Iron Fist #13 (2008)
The Immortal Weapons found the Eighth Capital City of Heaven when they discovered a map in an apartment once inhabited by the now deceased assassin, Zhou Cheng, leading to it. Accompanying Danny to the gateway, each of them focused their chi to open the portal, but once inside, they were captured by the monstrous citizens that inhabited the hellish place. Kept separated and tortured, the Immortal Weapons thought they would become permanently trapped until Iron Fist discovered a way to communicate and form a plot to escape. During a battle between Iron Fist and his predecessor, Quan Yaozu - the first Iron Fist and ruler of The Eighth City - Tiger’s Beautiful Daughter put their plan into action. She was the first to break her bonds, and then she released the others in turn. Fat Cobra saved Danny from being killed at the hands of Quan Yaozu, but Danny stopped Cobra from killing their tormentor. The Weapons returned to the doorway, prisoners in tow, reopened the portal and returned to Earth.