Leng San used up a lot of his concentration since inscribing high-level yellow rune caused a heavy-duty to his body. The boy’s current level of qi was only at the low-level green stage. He needed to squeeze his qi from the body to be infused in his blood. Then combined with the core as if the blood was ink. Before, while the boy was at the low-level blue stage, inscribing high-level green rune would not cause a burden on his physical body considering the gap between blue and green stages were like cliffs and the ground below, while the gap between the green and yellow stages were as high as hell and heaven. Or else the yellow stagers would not be classified amongst the best in the martial world. For each stage, the difference in their power level was at least ten times!!
Leng San inscribed one row of the rune.
Two rows...
Three rows...
4...5...6......8.....10.