Book 3 Chapter 12.1 - Root of Evil 

The elder personally saw Su out of Dark Red Castle. Regardless of whether it was the long and deep corridor or the main hall that was spacious enough to leave one terrified, whenever the elder walked past, the lights would die out one after another. It was to the extent where the faint red radiance seeping out from the walls and floors also completely disappeared. The elder was like a boundary; the world in front of him was brilliant and splendid, while what laid behind him was a deathly darkness. In addition, the light in front of him couldn’t seep through this formless boundary either, unable to illuminate the world behind the elder. 

Su immediately noticed the abnormality, but even after searching his entire memory, he couldn’t find any abilities...