The person whom the Covering the Sky Immortal Emperor truly feared was actually this remnant soul of the Tribulation Immortal Emperor.
The gap between an Immortal Emperor and a Tribulation Immortal Emperor was vast. Even if the Tribulation Immortal Emperor existed only as a remnant soul, it was extremely difficult to deal with. Most importantly, he could sense that this remnant soul of the Tribulation Immortal Emperor was immensely powerful—it had likely reached the peak of the Tribulation Immortal Emperor Realm.
"What is that?"
Chapter 553