[Storyteller's POV]
Brianna and company couldn't tell how Layland and company escaped the sub-dimension. The former also couldn't tell where the latter had gone.
When they got out of the subdimension, in other words, when they returned to the remote area of Axheria March, they couldn't even detect a trace of Layland and company's presence. It was as if they had never been there.
The sub-dimension was created by a Relic. One could not easily teleport out of it because it severed one's connection with the outside world completely.
In case one was talented enough to do it, one would appear in the place where the Relic was activated. The fact that Layland didn't appear there means that he managed to teleport himself somewhere else directly from inside the sub-dimension, which was a ridiculous feat.
Thinking about how it was possible brought frustration to Brianna and the others. The more they thought about it, the more afraid they became of him.
