Cruel Experiments!

They did not know what the Villain Wizard wanted to carry out many people in his castle. But what they know is now, the four of them have to follow Nauthiz quickly, who brought two people from residents of the Rainbow City to find out what they want to do to the two people.

The four of them passed a hallway back where the hallway was almost the same as the hallway they had passed before. But the torch lights in this hallway were more than before. And the road used in this hallway is better than the previous hallway.

The hallway turned out to lead them to a fairly spacious place; the place looked like having a stand for a meeting or seeing a show. In the middle of that place, there is something familiar to Judging by Xavier, Tyler, and Alexis.

"Gosh! is that!!"

"Black Crystal"

The four of them simultaneously said when he knew that what was in the middle of the place was a Black Crystal that had fallen in the middle of Rainbow Lake.