The Return of Ishtar/Watch Tower


 * Ki and Gil will enter this room through the sole door at the top of it. It contains seven Purple Bats, and six Green Snakes (which take eight hits to kill).
 * The key at the right of the room opens up the aforementioned door at the top of the room (but the seven Purple Bats might make it difficult to collect).
 * The aforementioned door at the top of the room leads back to The Staircase (Room Pass: YC7). Therefore, the only way out is the way you came in.