Cryptic Hideout

Aenigma Noctis is an area in B3313.

Description
The area is a series of rooms. The main room has walls that resemble the night sky, with a stairway leading up to the cryptic symbol often recurring in the hack. Facing this symbol, going through the left door leads to a smaller room with a Bob-omb Buddy, while going through the right door leads to a hallway, and then a room where a faceless Mario resides. Going through the back door leads to a stairway with another double door after it. All rooms except the main one have light blue brick walls, while all of them have a checkered floor and a ceiling similar to the main room's walls.

Like in many other areas, a crimson fog can be seen throughout all of the rooms, which disappears as the player gets close to it.

Origins
This area seems to be an original creation in terms of the room layouts. The ceiling texture can be seen in the Shoshinkai beta of Super Mario 64. The carpet texture in the staircase room is from the vanilla game, while the main room's wall texture seems to be a darker version of a wall texture used in the same game. The purple texture used for some stair parts in the main room might be inspired by a mid 2020-video showcasing the internal castle plexus in what's likely a private ROM hack.

The music is the "Castle & Fortress" theme from Super Mario World 2: Yoshi's Island. It uses the same soundfont as the Piranha Plant's lullaby.

Leading away

 * Click Clock Climb - Enter the strange symbol seen in the main room of the area.

Two-way

 * Plexal Castle - Go through the double door in the room with the large stairway.
 * (before v0.7) Purple Upstairs - Go through the double door in the room with the Bob-omb Buddy.
 * (after v0.7) Funhouse - Go through the double door in the room with the Bob-omb Buddy.

Trivia

 * In older versions, most of the wall textures used to be purple, and the main room's ones were a dark pink. The dark pink wall texture can be seen even in newer versions as the main room's design changes after activating the faceless Mario's army, although the player is not supposed to reach that room in this state.