Magic
(From Blue's Perspective)
That night, right after dinner, Dem took three magical devices from the table drawer in our bedroom and established one of them in the bedroom.
"What is that?" I asked.
"It's used to cut the possibility to use teleportation in this room. No one can come here from outside and no one can go anywhere from here using teleportation," he said.
I did not know what to do, so I was sitting on the bed, watching him do everything. "Why didn't you do it before? I mean, you are the King, so…"
"That's because of that silver punk," he said. "He used to come to my room frequently by teleporting. So, I did not establish the device sooner. Even if someone else tried to assassinate me by coming to my room, I could sense them immediately."
"Yeah, you are a light sleeper."
"Yes, that's why there was no need before. But things are different now."