Everyone froze at that moment. What was necessary to cultivate the Space-Time Realm? Comprehend the four sublaws of their affinities. Each sublaw comprehended meant they could breakthrough into the next stage of the same realm. If they could comprehend all the sublaws at once, all they would need to reach the Divinity Realm was Divine Origin Energy... which they have plenty of after their last visit to planet Earth.
There were so many Divine Origin Energy Cores in the Soul Gem Dimensional Realm that it wouldn't be an issue even if they decided to use some to accelerate time a hundred times. What stopped them from advancing nonstop was indeed just the laws.
"This is a chance to go straight into the Divinity Realm in a short period of time," Roan added. "We need strength for both our main objective and to deal with the visitors from other Universes. In the end, there is nothing better to stay alive than becoming stronger ourselves."