This was Yun You's first time witnessing the appearance of the Death Domain in action.
A massive yet ethereal red thread-like substance swiftly wrapped around the edges of the Floating Island, enveloping the outer barrier that was visible to the naked eye from all directions, completing the enclosure. It resembled a ball of yarn wound tightly around a ball.
It left no gaps for escape and sealed off sound and vision from within and without.
If someone were outside in the Lightning Storm at this moment, they would be surprised to find that the entire region of the Floating Island, the 300-kilometer sky fortress, had completely vanished, with no way to detect information from inside using any instruments.
Similarly, those on the island found that the outside world disappeared behind the red thread, leaving only the crimson domes in their view.
Subsequently, various special rules belonging to the Death Domain descended.
The first to arrive was a series of eerie "chants."
