Board Thread:The Last Sovereign Discussion/@comment-27713488-20180114010136/@comment-31763506-20180117085622

You're right, Ripett, it is called the "Roaming Fortress".

OK, I see that we have several possibilities:


 * Flying castle or city.
 * AT-AT.
 * TARDIS.
 * Something in the Demon Realm that works like a TARDIS.

Any other ideas?