Noah returned inside the separate dimension after he witnessed the changes caused by the quasi-rank 7 Eternal Snake. It was time to make his body advance, so the hunts could wait until he came out of his seclusion.
Every breakthrough of his body would often force him into hibernation. Advancing from one rank to another would also create a chrysalis, but it was hard to calculate how long they would take.
It was the same with his dark matter. Noah's higher energy depended on his darkness, but it didn't have a clear behavior. His breakthrough to the solid stage didn't make it evolve.
Noah could guess that the dark matter would reach the next state when he advanced to the divine ranks. He could predict that his higher energy couldn't remain the same after his darkness went through that massive change.
It wouldn't make sense if the black hole didn't change at that point. Yet, Noah still couldn't be entirely sure about that due to the higher energy's peculiar properties.