These iron doors were packed so densely they were beyond counting; one could only imagine how many living beings were imprisoned within.
Once the two young men entered, pairs of blood-red eyes appeared at every iron door, an utterly chilling sight.
Yet the two young men seemed long accustomed to it, each taking a Storage Bag from his waist.
"We didn't come for you this time. Behave yourselves, or don't blame me for being rough."
The young man carrying the Storage Bag walked ahead, issuing his warning. Whenever he passed an iron door, he took out a supreme-grade immortal stone from the Storage Bag and tossed it inside.
As long as a single supreme-grade immortal stone was thrown in, the blood-red eyes on that iron door would vanish.
The two continued down the stairs, making their way toward the very bottom.
After walking for a full half hour, they finally reached the lowest level.
The walls here were already coated in layer upon layer of frost, and the two young men could not help but shudder.
Even True Immortals felt cold here; one could imagine just how eerie this place was.
At the very bottom lay a level expanse, and at its end stood a massive iron door. Unlike the others, every iron bar on this door was engraved with densely packed runes.
"Let's go."
The two young men exchanged glances and swallowed hard before cautiously approaching the iron door, one step at a time.
As though half a century had passed, they finally arrived before it. One of them tremblingly pulled out a key from his robes and opened the iron door with shaking hands.
The instant the door opened, both of them felt their breathing seize up as a dense aura of Blood Baleful rushed straight at them.