The corridor will begin to get more bloody and corrupted as you continue on. The more the red demons attack, the more bloody and decayed Rust will become. Eventually, the corridor looks a lot like that of the Flesh walls world with strange white things growing out of the floor.
- You have to clear this area whenever you want to see the true ending.
- Rust's theme plays in this area.
- You can hear a heartbeat in the last room, and the pitch is much slower.
- It probably represent's Sabitsuki's or Rust's core, due to the final room resembling a body, and Demon Sabitsuki in the room after it.