Needless to say, but all the girls with the exception of Sarina were surprised to see the blue transparent "tower" which was now surrounding them.
And when they saw the thing light blue mist that resulted from the condensed spirit energy which was purified by the furnace, they nearly lost it.
Specially Eris and Mylene to their surprise, their dantians reacted to it for a split of a second, before they returned to their normal lethargic state in which they had been since they arrived at this "mortal plane".
They exchanged gazes just to see the surprise in the eyes of the other, if what was needed for them to be able to cultivate here would have been as simple as just gathering spirit energy and purifying it, then they wouldn't have been trapped here for countless of years.