[quote=kapuchu]
 Eldritch: That room of Scalpel's, what exactly is it? I get the feeling that it's a temporal pocket of sorts, but a very, very big one, and in case it is I'd like for you to remember what Scalpel is only a mortal, and there's a limit to how powerful he is. A temporal pocket of that size seems... a bit much. In case it's just a normal room which requires a magical key (of sorts) to enter, then just ignore this.
[/quote]

Its a normal room, with a lot of magical countermeasures, a complicated series of locks, and a shit ton of metal. The reason its so big is that it basically consists of the innards of the House and stretches to the roof. If it was the reference to it "disappearing" thats more to do with Scalpel knowing exactly how to disassemble it in an extremely fast fashion and get the hell out of there within a limited period of time, It really helps that he now has a lot of helpers around him these days.