Both Ye Han and the Glacier Immortal Emperor had seen it before the True Immortal's Eye fled: only after producing a key to a mysterious secret realm had it opened the Metal Gate...
In other words, to pass through the Metal Gate into this mysterious secret realm, they would need these keys to open it...
The problem was that the True Immortal's Eye, or even more parts of a True Immortal's body, might be waiting on the other side. That creature was exceedingly powerful and dangerous, capable of possessing a cultivator's body. The Tower Mountain Immortal Emperor was a clear example...
Ye Han and the Glacier Immortal Emperor both possessed astonishing cultivation and divine abilities, but they were not actual True Immortals, after all. What would they do if they encountered something even stronger in that mysterious secret realm?
More importantly, the reality was that neither of them had time to consider so much. With each successive tremor, the Metal Gate looked as though it was about to disappear...
If the Metal Gate disappeared, they might have to wait tens of thousands of years before it opened again...
Although both Ye Han and the Glacier Immortal Emperor had lifespans far longer than that, they would still have missed this opportunity for the next tens of thousands of years...
This was a treasure land and an opportunity that the Ancient Star Domain's two strongest races, the Immortal Race and the Devil Race, fought to the death to claim. How could they let it slip by so easily?
Besides, the most important reason both Ye Han and the Glacier Immortal Emperor had come to Great Hell was to enter the mysterious secret realm and seek more opportunities and treasures...
Now that they knew danger awaited on the other side, were they really