Celestial Soul
Soul Containers were items that could be found in the Mortal Realm too. Though they were something that were mostly used by those above the Nascent Soul realm as a means to preserve their life when they died.
They would let their Nascent Souls enter them to survive for longer periods. But it wasn't a foolproof measure as the destruction of the container would also lead to the destruction of the Nascent Soul. As such, whenever something like this was used, it was usually kept secret.
"A Soul Container? But why can't I sense it?" Lin Mu was surprised.
"This isn't just any Soul Container." Xukong replied. "This shouldn't even be in the Immortal Realm." He said, his voice turning heavy.
Hearing that Lin Mu's eyes went wide as a thought appeared in his mind.
"You mean to say this is from… The Celestial Realm?!" Lin Mu questioned in shock.