Ki and Gil enter this room through the door at the right of it. It contains twelve Purple Bats and five Blue Knights (which, once again, have red eyes).
The key at the top-left of the room opens the aforementioned door at the right of the room, the key at the top of the room opens the door at the top-left of the room, and the key at the top-right of the room opens that door at the centre-left of the room. (The Bats may make them difficult to collect).
The aforementioned door at the right of the room leads back to Shunned Cavern (Room Pass: SVY), the door up at the top-left of the room leads to Small Dome (Room Pass: Q37), and the door at the centre-left of the room leads off to Rest Room (Room Pass: 2C7). You should remember these.
