Castlevania: Circle of the Moon/Audience Room

Intro
Having cleaned out the Catacomb, Nathan begins the long trek back up to the castle. Make sure you have everything you need, and have saved (or at least recovered your HP/MP from the boss fight) and enter the Abyss Stairway from the left opening in the ceiling of the Catacomb.

Abyss Stairway
Head left and begin climbing (well, jumping a lot, to be specific) until you get to the second platform in the middle of the stairwell. From there jump and whip against the right wall to open a room containing a and two enemies. The Slime drops the (and ) and the Axe Armor drops the. Eventually. Once you get the cards, continue up the stairs until you can walk to the right. Go through the door and while standing on the next platform, drop straight down. Go through the door (this one is visible) and grab the. Head out and drop down, back in to the Catacomb.

Repeat the climbing process, but this time continue going up, into the next section of the climb. Work your way up, avoiding or killing the Bone Heads that hang from the ceilings. The second door on your right takes you to a save room, so use it if you wish, then resume climbing. When you can't climb any higher, you'll see an opening to your right, so head through.

This section is just like the previous one, except longer and there are Skeletons and Gremlins in addition to the bone heads. Keep climbing until the area widens. You'll see a door to the right (skip it for now) and go up to the next level. The left wall can be broken, leading to a room with a and a Skeleton Soldier, who drops.

Keep climbing up the left half of the stairway, and eventually you'll jump through an opening in the ceiling, into the Audience Room.

Necromancer

 * See Necromancer for more.