Their long lifespans had given the spirit race almost endless time. The previous members of the spirit race had died not because their lives had come to an end, but because they felt that there was no more hope. They felt that Zhao Hai no longer needed them. That was why they had chosen death. Remember, they had chosen death, not natural death.
They chose to die. They wanted to die, and because they chose to die, they would naturally die. It was just like a person who wanted to die wholeheartedly. He felt that there was nothing in the world worth living on. This emotion would slowly affect your body, and you would eventually die naturally. This was a very terrible thing, but at that time, many ghosts chose to do so because they felt that there was no meaning in their lives.
