I’m confused did he lose his memory, maybe I have to reread but im too lazy rn
To continue to that reply above mine
In the past, Nightmare restrains the opponents with their trauma and drains their energy but now it's a parasitic-type dungeon. Taegun being the host, got attacked by Nightmare and his energy is being drained by it. I guess you can say that to distract Taegun from acknowledging it, he's being shown a dream where everything is "perfect", as we saw in this chapter, Taegun managed to snap out of it and came back to reality!
I keep coming back to this a rereading it. I swear it’s got nicotine in it or something