If that was the case, then...
The Son of Heaven quickly realized a possibility that surprised and delighted him.
Perhaps, the current life-and-death situation could be saved...
As the Son of Heaven pondered, Sky City, hovering in the sky above, suddenly let out a thunderous noise and began to move.
The entire city, as if starting its engines, accelerated upwards from a standstill, gaining speed faster and faster.
On the sea surface, the three Titans, seeing Sky City start to ascend, immediately became anxious.
The Titans quickly communicated, and then, in unison, they let go of the Son of Heaven and the Blood Emperor and leaped up from three different directions toward the city in the sky, apparently trying to grasp Sky City and prevent it from ascending.
However, as the Titans neared Sky City and were about to touch its edge, they passed through it without any resistance, unable to touch anything solid.