Before everyone, they saw the two most powerful seas of the Grand Celestial Seven Seas, the Death Sea and the Spirit Sea, being forced to merge.
They could see a black-and-white pillar of light that seemed to be communicating with this two diametrically-opposite powers.
They could see a tear in the Death Sea, which was both silent and deep. It was impossible to imagine the destructive power that it possessed.
The many calamities in the Netherworld Sea were cruel and extraordinary. However, its destructiveness, no matter how violent, was only temporary.
However, the dark waters of the Death Sea were capable of obliterating anything it touched.
The power of space and time, in the face of this all-ending power, appeared helpless. Like everything else, they were destroyed almost instantly.