Ki and Gil will enter this room through the first door at the left of it. It contains one Wizard, eight Mirror Knights and four Black Captain Knights (which have yellow visors). Gil will start directly on top of one of the Mirror Knights, so the second player will have to react quickly if he does not wish to die...
The Trophy at the left of the room, like the Fork in Kitchen, can only be collected by Gil, as Ki will just walk through it as if it was a hologram; it will not have any noticeable effect on him, however. It also looks somewhat like a golden version of the Kings who had appeared as enemies in Metro-Cross.
The first key at the left of the room opens up the second door at left of the room, and the second key at the left of the room opens the aforementioned first door at the left of the room. There are no keys for the doors at the right and top-right of the room - so there is no way to find out where they go to.
The second door at the bottom-left of the room leads to Museum (Room Pass: 2C2), and that aforementioned first door at the bottom-left of the room leads back to Trap Ceiling (Room Pass: H3Y). You should remember the first of these Room Passes - as that second one is of little use to you now...
