As four Nascent Soul Stage Dragon Souls merged into the imprint, it signifies that four slots among the Nine Generals of the Thunder Department have already been occupied. These four Dragon Souls have been controlled by Thunder City, becoming the most obedient Thunder Slaves.
For eternity, they will sink into oblivion together with the Thunder Giant City.
This also transforms the entire Azure Waves Island into a floating, mobile War Fortress.
"It's time to return!"
After completely refining the Dragon Souls, filling four of the nine imprints, Zheng Yi stands atop the towering Thunder City, urging four Thunder Dragons wrapped in lightning to pull this terrifying Celestial City, towards the distant rumbling.
After merging with the imprint and refining, regardless of their original state in life, the bodies of these four Dragon Souls were directly fused with lightning, altering their form, becoming dragon-shaped lightning infused with Thunder Essence Qi.
