Umbilical Cord Maze

Umbilical Cord Maze is a maze that is accessible by interacting with the mailbox in the Water Surface.

Features
It is a large maze made out of umbilical cords, with needles scattered around the world.

The most notable thing in this world are the large two embryos. Hitting both of them will start the Closer Casualties event. A part of the cord is tied up to a ribbon where a NPC that looks similar to the visible state of the Muffler Person can be found, sleeping on it.

An open hole can be found in the cord, which will lead to the Blood Flow Maze upon entering.

Directions
The Nexus -> Ice World -> Dark Staircase -> Water Surface -> Umbilical Cord Maze