[Eyes actually widen briefly at this news, assuming it on face value, which he doesn't, means any attempt they do make would fail.

His expression his mixed, annoyance, surprise also, but far less than his annoyance. Could it even be possible that nothing could be done? He admits it's far less likely for him to be able to be effective in a place like this than it would be back home with access to all the resources the Legion had at his disposal. It would be nothing to actually travel through dimensions with the machine he had just built.]

Any being that would be able to prevent such a breach is immensely powerful, as is bringing us here in the first place.

Is there a known reason?

Also... Other situations?