Chu Kuangren was locating the Creation Pool's location in the Creation Source but could not find it.
The Source was like an endless river, while Chu Kuangren was like a plank floating on it endlessly. Even though his cultivation speed and effectiveness would be greatly boosted, he could not escape it easily.
It was well known that the most confusing place would be the space between universes because it could trap one easily.
There was nothing there. Other than the Spatial Tribe, who possessed special techniques to explore the void, not even Monarchs could navigate their way through easily.
However, to Chu Kuangren, the Source was much scarier than the space between universes. If one could get lost in the space between universes, the Source could be called a cage.