Ou Yangming's body swayed slightly. After killing Zhang Yinli with the final slash, he seemed to be dispirited as his body was on the verge of collapsing.
He held his forehead while slowly squatting down, and grimaced in pain because his temples were somewhat hurting, as though something was going to emerge from it. Of course, no signs could be seen if one only looked at his outer appearance.
Ou Yangming knew that he was feeling this because he had overused his mental power.
He had 20 points of mental power, which was much more than his other attributes. This was why he could smith explosive arrows, achieve the state of the integration of Heaven and man, and control the power during the Blood Flights.