With the Dungeon's blessing, the Reflection Person's use of mental power showed Xu Huo another dimension of the Spiritual World.
In his earlier conversation with Tang Guangbo, Tang had mentioned the concept of a "Mental Defense Line."
It was easy to understand. Everyone, whether a Player or an ordinary person, had a Mental Defense Line as long as their mind was clear. But the "Mental Defense Line" Tang Guangbo had mentioned was more like an instinctive protective mechanism, not a form of self-protection people consciously employed.
Most people weren't aware of this "Mental Defense Line." For example, after Players evolved, their mental strength was clearly superior to that of ordinary people, but that didn't mean they understood what mental strength was or what their Mental Defense Line looked like. It was an absolute defense that existed whether or not a person was aware of it.
While tracking his own Reflection Person, Xu Huo had happened upon it killing Sutton and the others. In the final moments, Sutton had been almost unable to fight back. This wasn't an absolute suppression of mental strength; the Reflection Person had breached his Mental Defense Line. Sutton might not even have realized it. Once the line was breached, the Reflection Person could easily kill his mental entity without relying on anything physical. If the mental entity representing his independent consciousness died, Sutton would certainly die too.
The Reflection Person had certainly taken advantage of the setting, but it had given Xu Huo some inspiration.
Perhaps using an "anchor" only worked because it briefly broke through another person's Mental Defense Line.
A mental "anchor" involved projecting a certain amount of mental strength into someone else, rather like lodging it in their Spiritual World. Mental strength was inherently bound to an Evolver; for it to exist independently