Purification Formation (3)

Ruben looked dumbfounded at the ordinary well that seemed to be painted with strange painting by Riya in front of him in confusion. If he had to say, he really didn't understand what Riya was doing.

It didn't seem to look any different.

Only Samuel was looking at the well in front of him thoughtfully and then asked, "Do you need any magic cores?"

The five stones formation required five non elemental magic core to be placed above the stone. And that formation could only last for half a month at most, which was quite taxing to make. 

"Yes, one non elemental magic core," Riya replied and tapped the top of the pipe that was close to the well. "Just place it here and remember to replace it every half a month since I estimated that you will use it continuously for 24 hours a day."

"Ok." Samuel took out one non elemental magic core while Ruben moved the board to the top of the well.