Ki and Gil will enter this room through the door at the top-left of it. It contains twelve "Red" Ropers (which are green and take 134 hits to kill) and one "Blue" Roper (which is yellow and takes 254 hits to kill). Remember Ropers are named for their tentacle colours rather than their actual body colours.
This is the first room in game where the tops of the walls are coloured ruby-red instead of emerald-green, ochre-yellow or peach-orange (see image).
The key at the left of the room opens that aforementioned door at the top-left of the room - and the key at the right of the room opens the door at the top-right of the room. However, two of the Red Ropers will start out on the keys' positions - so you will have to wake them up in order to collect them.
The aforementioned door at the top-left of the room leads back to Shrine of Evil (Room Pass: 2VY), and the door at the top-right of the room leads to Quox's Labyrinth (Room Pass: 7C7). (Again, the former room is not to be confused with Chapel of Evil (Room Pass: SF9), which has similar name)...
