The changes in the surroundings and the shift in mists made Remey and Su stop what they had been doing. Su felt that she could keep learning more about the flow of mana and making it better acclimate to her body. Allowing her body to become one with the surrounding manas would have been an ideal way to improve her strength.
However, her mind was running wild with the feeling and ideas. How she could incorporate this in to training of every single force within Genesis.
This was a way for them to better understand their own affinities and manas that would allow them to absorb or even generally sense all manas around them based on their own aman. Something that the witches had done whenever possible because of their beliefs and strict teachings.