Hong Huang's great grandpa told her that, aside from all this, the Lower Realm held other benefits as well.
For example, the Ancient Battlefield of the Fire Nation.
The Ancient Battlefield the Devil Woman spoke of was the one Shi Hao had discovered through the golden coffin using his Double Pupils. Apart from a group of heroic spirits, it contained only a pile of battered, broken weapons.
For example, the Supreme Divine Treasury.
The Supreme Divine Treasury could not possibly be hidden within the Ancient Battlefield of the Fire Nation.
To learn where the Supreme Divine Treasury had gone, one first had to understand its origins. The so-called Supreme Divine Treasury was, in truth, the inheritance of the Supreme Hall in the Upper Realm. Every generation of the Supreme Hall had only one successor, and whenever a successor of the Supreme Hall appeared in the world, they would be a powerhouse of the Supreme Realm.
In the Upper Realm, the Supreme Hall had a rival of equal standing: the Immortal Palace. Though the Supreme Hall had few members, its strength surpassed that of the Immortal Palace. As a result, neither side could do anything to the other, and the two great halls remained locked in opposition. However, the final master of the Supreme Hall had forcibly tried to open the Three Lifetimes Bronze Coffin and was ultimately severely wounded by it.
Seeing this, the remnant immortal of the Immortal Palace seized the chance to completely destroy the Supreme Hall. Fortunately, the final master of the Supreme Hall understood that its end had come. To preserve its inheritance, he placed most of it inside a jade box and had a giant turtle carry it down to the Lower Realm to hide it.
Hong Huang had descended to the Lower Realm because