Importance of mental power

Shingi spoke with Pre a little more and understood his current situation. Because when he earned his Class, his Special Requirement, which should be that he had the Spirit Element at his Mana Tree, had reduced the time it would take. 

So he had thought that his Sleep Mode was the same as the time for earning his Class since he had completed the task to earn his Class when it ended. But in reality, that wasn't the case, as the two had similar duration but could be affected by different variables.

So whatever happened each time he reached those checkpoints, it reduced his Sleep Mode duration only but not the duration of his Evolution. Still, his Evolution time should be less than three weeks because of his Special and Secret Requirements.

He had already spent less than a week in the Darkroom, leaving him with two more weeks or so. Or that would be the case if he was in the Darkroom.