Void Walker Scripture and 7th floor

From the chapter, he could see that the void was said to be deeper than even dimensions and scary creatures existed in that place, and they are incapable of surviving outside the void. But in the depths of the void, even more terrifying creatures resided, and the chapter mentions that one can only use the power of the void to practice their physique, but not attempt to venture. This was not just because of the creatures, but rather the energy in the void interlayers seemed to be different and the moment he succeeded in practicing the first chapter he would realize it.