"It's not your fault. Your sixth brother carved too fast. I'll slow down this time, to one hundredth of the speed. Watch carefully..."
Mu Bai nodded in agreement. He watched Xiao Liu use the Soul Saber to carve a triangular pattern into the soul jade, stroke by stroke, then cut several diagonal lines inside it. Once the carved lines connected into a whole, a faint radiance flickered across the pattern. The moment it lit up, Mu Bai sensed wisps of Soul Power emanating from the soul jade, which had been as still as an ancient well, just as they would from a soul crystal.
"Why don't we carve formations into soul crystals?"
Mu Bai had been wondering about this question already, and now he blurted it out.
"That's a good question. Learning means asking questions as you learn. Let me tell you, soul crystals are hard and brittle, and they break easily when carved. Besides, once a formation is carved into a soul crystal, its Soul Power fluctuations are far too obvious. People can easily detect them..."
Although the Artifact Spirit Ancestor had given Mu Bai a Jade Slip, and he had skimmed through some formation Jade Slips at the Northern Territory Sect, he truly knew very little about array offering. Xiao Liu's explanation sounded quite reasonable.
"Have you learned how to carve this Alerting Spirit Array?"
"Let me try..."
Mu Bai copied what he had seen, holding a piece of soul jade in his left hand and the Soul Saber in his right, carving according to the strokes he had just watched Xiao Liu make.
"No, that's ruined. You need to apply force evenly, keep the formation lines at a consistent depth, and still vary the force..."
Looking sheepish, Mu Bai picked up another piece of soul jade. After