Crystal

Crystal is a subrealm in RapsterZeber's Towers of Hell. You can get to it from Ring 6, and after that you can get to it using the Ring Select.

The subrealm is inside of a giant crystal with no lobby in it. A sign in it says "The world's largest crystal, owned by Norby and Narby Inc."

You can find the groups of towers, Baby Tower, Normal Tower, and so on, throughout the insides of the crystal. If you look outside of the crystal you can see it is in a giant building with huge boxes in it, and a sign saying "Norby and Narby Inc."

If you leave the crystal you will instantly die and on your screen you will see the words "You do not have access to this area. You are not a Level 5 employ."

Baby Towers
Steeple of Crystal Mining (Easy)

Steeple of Norby and Narby Inc. (Medium) (gives you the level 1 access item if you beat it. You can use it to jump 5 studs higher but counts as a boost item meaning you can't beat citadels and soul crushing towers with it)

Normal Towers
Steeple of Aquatic Crystals (Hard)

Steeple of Enchanted Crystals (Difficult)

Advanced Towers
Steeple of Overcoming Towering Crystals (Challenging)

Steeple of Crystal Power (Intense)

Pro Towers
Steeple of Crystal Kingdom (Remorseless)

Tower of Crystal Corruption (Remorseless)

If you can beat all of the towers you will get the Crystal item. If you click when holding it, you will get twice as big, but you will take twice as much damage. Using it counts as a Boost Item so you cannot beat citadels and soul crushing towers with it.