The black-haired old man couldn't invade his brain, so naturally, he could only invade his soul.
But after activating "Unyielding Will," Su Ze's soul had merged with his body and was now protected and amplified by it.
Unyielding Will (Tier 5, S-Rank): The spiritual will and physical consciousness merge into one. In this state, the physical body amplifies Spiritual Power. The stronger the body, the greater the amplification. If subjected to a spiritual attack, damage is reflected back to the attacker.
The black-haired old man sensed the location of Su Ze's soul. The shadow he had become was formless and intangible, so he tried to merge into Su Ze's body to devour his spirit.
However, this was tantamount to another form of spiritual attack on Su Ze. Once the "Unyielding Will" skill registered it as such, the damage reflection was naturally triggered.
