There were two doubts in their minds once they started cultivating. The first one was the duration as to how long the Divine Origin Energy area would last. As mentioned before, these areas rarely appeared, and when they did, they only lasted for a few hours. How long has it been since it converged at this point?
The second doubt was in relation to the ancient beast. Would it wake up while they were cultivating? If so, would it attack them? They couldn't be sure. First of all, just because its eyes were closed, there was no guarantee that it was really sleeping. Perhaps it knew that Rean's group was there from the start but considered them as mere ants, so it didn't bother with them.
Besides, it was obviously badly injured after its battle with the snake, so there was a chance it didn't want to make unnecessary movements at the moment. Regardless of which option it was, their group still kept an eye on the beast for any changes in its behavior.
