บท 822: The powerful enemy in the darkness!

"A full luster and abundant energy, but why do I feel that there's something different about this crystal?" Xia Laoshi examined that bright yellow grade 4 Origin Crystal Xia Fei had produced and muttered to himself.

He stroked his spatial ring, producing a complicated device. It looked like a scale, but it was much more intricate, all kinds of flashing electronic equipment attached to it.

Xia Laoshi placed the crystal on the balance and activated the device. A soft beeping could be heard in the training room, and it was not long before a curvy diagram and a row of data was produced.

Xia Laoshi gasped as he stared at the screen and murmured in shock, "What a sharp energy curve! So rich in energy!"