Herring didn't explore the Nightmare Dungeon of Dark Souls today. It wasn't because her body was overwhelmed, but because she found that she was getting hooked on Dark Souls.
This proved that the Nightmare Dungeon was corroding her mind more and more severely, causing signs of addiction to appear.
As one of the contractors of "Dark Side," while Herring spent more time fighting in Dark Souls, the energy "Dark Side" got from the Nightmare Dungeon of Dark Souls also increased.
Accordingly, the pollution Dark Side suffered became more serious. This was why Dark Side was also harmed after dying inside, even though it was a Dream Seed.
When the harm reflected on Herring, the dark emotions and killing desire accumulated inside her body would rise and slowly lose control.
