The rolling waters, the terrible breath and the environment in the dark sea have remained almost unchanged for ever.

In Shenquan sea area, several ships, beside an open reef, continue to swim, a shiny silk thread, released from these ships, hanging in the sea below, as if fishing something.

Suddenly, the silk thread on one of the ships was quickly pulled back to the ship, and a gray knife hung in a section of the silk thread.

Although this knife looks very ordinary and has nothing unusual in it, the knife that can survive in such an environment as the dark sea is by no means unusual.

"This is the...