In truth, even without Celestial Emperor Nandan's warning, Honghao Heavenly Emperor, Heavenly Emperor Mingluo, and Yu Xuan had already guarded their Primordial Spirits tightly, doing everything they could to resist the powerful, uncanny waves of divine sense sweeping over them.
Yet no matter how they resisted, they were still enveloped in the end. The strange waves were somewhat similar to a Dharma Realm, but not quite the same.
"What kind of divine ability is this?" Honghao Heavenly Emperor cried out in shock.
"You can call it the Heavenly Dragon Soul Domain," Lu Xiaotian said calmly.
This technique was exceptionally overbearing, especially after merging with Nine Nether Weak Water, which made its attacks on the Primordial Spirit particularly powerful.
If the four Celestial Emperors hadn't joined forces, any one of them would have been in danger. If even one had been a little slower to escape, Lu Xiaotian might have dragged their Primordial Spirit into the Heavenly Dragon Soul Domain. Within this Soul Domain, the Dragon Soul Flying Sword could unleash its full power.
But the four Celestial Emperors guarded their Primordial Spirits closely and made no reckless advances, leaving him no opening to exploit. Lu Xiaotian could only draw some of their divine sense, scattered outside their bodies, into the Heavenly Dragon Soul Domain. Even when he succeeded, it wasn't enough to seriously injure the Celestial Emperors.
Even so, the four of them were thoroughly shocked. They could directly and clearly feel just how powerful Lu Xiaotian's Primordial Spirit was within the Heavenly Dragon Soul Domain. In terms of Primordial Spirit alone, even all four of them together might not be able to overcome him.
They didn't even need to look with their eyes. The Dragon Soul Flying Sword seemed to use the divine sense it had pulled away to