Undead Heart

After they left the treasury, Nitran brought them into a large hall that was overflowing with mana. 

The sheer mana density swept over Kyle, preventing him from moving even a muscle. 

Only after the Undeads around him used their own mana to prevent the mana inside the room from restricting Kyle was he finally able to move again.

Through this, Kyle was able to take a look at the large hall and perceive everything that had previously been hidden from his eyes. 

While calmly looking around, he felt that the surroundings were somewhat ominous and eerie. 

But, that was not something Kyle had been unable to perceive before. 

Rather, it was evident because the entire hall was enveloped in dark colors, and everything was intertwined with a distinct death aura. 

This death aura was denser than anything he had seen before, and it was already manifesting all around him, taking on a dark color.