Under Zhou Tian's arrangement, when living beings were slain in that space at the time, one could obtain a kind of Special Energy. And that Energy was exactly the same Special Energy Zhou Tian had sensed when entering this space before.
That Energy didn't have much effect on the Divine King, neither providing rule abilities nor helping Deities comprehend rules. However, Zhou Tian was confident that as long as that rule existed in his space, it would be possible to attract numerous Deities into it without any Problem.
Even though it seemed that such Energy and rules were unrelated and quite useless, in reality, that Energy might not be of great use for powerful Deities like Zhou Tian and his peers, yet for ordinary Deities, it held its attraction.
