The Dark River's current was swift, and the submarine bumped against the riverbed dozens of times before it slowly stabilized its center of gravity and sailed at a steady speed.
The more he explored, the more astonished Li Ang became. The depth and expanse of the Nine Nether far surpassed the surface water systems. It reached depths of three thousand meters, then four thousand, and still continued to descend!
This was already deeper than the ocean floor; where on earth could all this water be heading? Surely it couldn't truly be flowing towards the legendary end of all rivers, the Ruins...
Like Li Yuan, the Nine Nether Dark River had its peculiarities, diminishing the mysterious connection between Li Ang and Mo Si. With the submarine having plummeted so far and through thick rock layers, he had to concentrate fully to contact Mo Si. This required even more Spiritual Energy to manipulate the propeller and control the direction.
