Hmm.  Having done a bit of research into the transitive planes, I’m starting to think that adding Muramasa’s Ethereal reaver special quality onto the castle is actually less of a security feature and more of a security flaw...  Basically, under normal circumstances, the Ethereal Plane isn’t something you can actually access from the Outer Planes, because it’s entirely coterminous with the Prime Material.  Making the castle exist on both Niflheim and the Ethereal Plane at the same time thus means that the castle is technically also on the Material Plane, or at least is much more easily accessed from there, which really wasn’t my intention when adding the quality in. ^^;<br/><br/>If at all possible, I’d like to swap it out for a suggestion I made earlier for someone else that went unused, and give the castle the ability to gain various move speeds based on Torahime’s shapechanging ability.