        “Mm-hmm.  Now, there is one more thing.”  Celestia fixed Lyra with a serious stare.  “If I have any reason to believe Equestria is in danger, I will collapse the spell without a moment’s hesitation.  If you are not within the hemisphere of its reach, it may not bring you back.  Alternately, you may be captured by the creature, or its kin.  Should that happen, for the good of Equestria, you must dispel the portal on your own.  In either case, there is very little possibility of your rescue.”