Heart.
Based on Han Dong's previous observations of the "corpse-thorns."
He had confirmed the existence of the Thorn Heart, as well as the fact that the heart was an absolutely vital organ. It could even perform functions related to the brain, making it far more important than a human heart.
For these Saint-tier Lifeforms, the head was more a part used to display abilities than a fatal weak point.
During the battle just now, Han Dong had fully opened the Lesser Demon Eye and carefully observed Tailor Ru's heart. He could basically confirm that the heart was a fatal area.
He even formed a hypothesis: for Saint-tier Lifeforms, the heart was a crucial core organ tied to the foundation of life itself.
However, injuring the heart would not necessarily be fatal.
As the core supplying energy and the central hub controlling the white threads.
The moment Han Dong's sword pierced it, the White Flesh Apostle immediately collapsed, turning into scattered chunks of white flesh and limp white threads.
Tailor Ru stared at Han Dong with an astonished expression.
Compared to having his heart pierced, he was more surprised by another ability Han Dong had displayed.
Even in the Saint-tier World where he came from, individuals like Han Dong who wielded two different kinds of power were rarely seen.
"Why is holy blood flowing through your body?"
That sentence immediately confirmed Han Dong's guess.
The origin of the Holy Sword Bloodline that the Hall Family's ancestors had accidentally obtained in Destiny Space was unknown.
Now, the holy blood had been transferred to Han Dong, yet there were still no clues... He only knew that the Holy Sword possessed an extremely powerful suppressive effect on Abyssal Demons.
After learning about the characteristics of the Saint-tier World, Han Dong began to suspect