Ring 4: The Caves of Descension

The Caves of Descension is the fourth ring in Luigi's Towers of Oddity (Fan Idea), and contains Medium-Remorseless difficulty towers with an Extreme Soul Crushing, Difficult Mini-Tower, and Intense Citadel. It requires 18 World 1 towers to enter and has 16 towers. One unique mechanic about this ring is that all of the towers are descending towers. The map is a wide open cavern with several stalagmites and stalactites in it. The towers are scattered throughout the area, while the Mini-Tower lies inside a hole, the Soul Crushing at the bottom of the cave, hanging over a lava pit, and the Citadel having it's floors going all around the cave, (it is wacky frame). The lobby seems to be an underground base with several fortifications around it. There is also a tram you can take to go back to Ring 3: The Mountain of Ascension. Additionally, the cave also opens up to a small island in the middle of the ocean if you follow a path and doing so will teleport you to Ring 5: The Ocean of the Unknown.

Starter Towers
Tower of Grim Outcomes (Medium)

Tower of Reddening Depths (Hard)

Tower of Possessive Spirits (Hard)

Skillful Towers
Tower of Horrible Odds (Difficult)

Tower of Horrifying Tuesdays (Difficult)

Tower of Voidal Chaos (Difficult)

Professional Towers
Tower of Broken Gameplay (Challenging)

Tower of Impossible Speedruns (Challenging)

Tower of Foolish Gullibility (Intense)

Extremely Hard Towers
Tower of Twisting Platforms (Intense)

Tower of Dark Descent (Remorseless)

Tower of Extremely Complex Scaling (Remorseless)

Tower of Endless Mayhem (Remorseless)

Mini-Tower
Not Even a Downward Tower (Difficult)

Citadel
Citadel of Rocky Exploration (Intense)

Soul Crushing
Tower of Amplified Acrophobia (Extreme)

How to Find the Hidden Towers
NEaDT: Jump down into the hole of endless falling outside the lobby and fall for a minute or two, then you will land in the NEaDT portal room.

CoRE: Go to the small building atop a rocky "hill" that is called "Luigi's Cave Tours," and inside will be the CItadel.

ToAA: Go to the sky lobby and do an almost invisible obby far abouve the rest of the ring, and then you will arrive at ToAA's room.