The art of combat was ingrained in Wei Wuyin's soul, honed through simulation and practical execution, and when it came to understanding the concepts of mortal interaction from response to mental manipulation, his grasp was unrivaled. Despite this, this body was foreign to him. Whether it was his reaction or execution, a few flaws coincided with flawless execution.
The injury on his arm and abdomen from the spear was a sign of inadequate bodily control. While he had perfectly relied on tactics of misguiding and the power of assumed expectations, he was unable to avoid the spear's bladed edge between his arm and abdomen. In hindsight, he could have relied on a safer series of tactics.
But when has he ever been afraid of risk to maximize gains? And what better gain could one achieve than complete victory and the annihilation of threats?