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The mystery behind the bracelets not working was quickly resolved by yours truly, as I was able to easily detect weird barriers outside of the Nightmare Realms' main dungeon area.
Right outside, where the Nightmare Void is located, was where I found the barriers. I had noticed them slightly on our own Realm exploration, but I think I ended destroying it on my battle against the Nightmare Demon.
Nonetheless, the rest of the Realms all had them, which were composed of roughly a hundred Nightmares of Lesser form, mixed together by clearly someone that knew how to do this.
"I think this means that someone else… made these before the students entered, maybe yesterday," I explained. "Someone in this academy is planning to kill the students."
When I explained this to the professors, they all felt slightly shocked.
"This is… although that's a possibly, let's start by not pointing fingers at one another, Maria."
