After observing the occurrence of the Black Tide thirty-six times, the three couldn't help but marvel. They feared that only a civilization like the Observer's world, with a camera installed in every corner, could observe the Black Tide phenomenon.
The occurrences of the small black spot were irregular, sometimes spanning one hundred to four hundred years, the timeframe was extremely broad.
The location of the black spot's appearance was also uncertain; it could occur on planets, in the universe, in the void, seemingly at random.
The behavior of its expansion was also different each time. The largest expansion was the thirty-fourth time—devouring a corner of the world and a hundred mother stars. The smallest expansions were the first, ninth, eighteenth, twenty-fifth, and thirty-first times when they didn't seem to expand at all and disappeared soon after their appearance.
Moreover, except for the thirty-fourth time, the area of the Black Tide was not significantly large.