Ki and Gil will enter this room through the door at the top of it. It contains one Sorcerer, six Steel Hyper Knights and two Red Knights (590 hits to kill).
The key at the bottom-left of the room opens the door at the top-left of the room, the key at the bottom of the room opens the aforementioned door at the top of the room, and the key at the bottom-right of the room opens the door at top-right of the room. You should remember this information now...
The door at the top-left of the room leads to Weapon Storage (Room Pass: 2C7 - same as Rest Room), while that aforementioned door at the top of the room leads back to Laboratory (Room Pass: 9C2 - same as Spoils Room), and the door up at the top-right of the room leads off to Helm Storage (Room Pass: 9F2 - same as Watch Tower). You should remember the first and third of these Room Passes, as the second one is of little use to you.
