Fear
A moment comes in one's life where they realize that events would sometimes unfold in the worst possible ways, and they had no way to overcome them. They would feel a sense of helplessness as they shook their heads depreciatingly, wondering why their luck was always this bad. They would feel chains wrapping around them as they were dragged further and further down, continuing to sink until only darkness remained for them.
The many beings in the centermost cavern of the Treasure Abode where the Devilish Time Unveiler lay were just beginning to feel this familiar feeling.
They physically began to feel space constricting around them first as the being rising from the black coffin used some inexplicable technique to restrict any and all spatial movements. They then emotionally began to feel this same feeling as they began to understand just who the deformed skeleton with atrophied muscles was.