Crystal Cavern

Last updated: X33.0.0
Crystal Cavern
Difficulty: 5Difficulty: 5Difficulty: 5Difficulty: 5Difficulty: 5
Teleportation Disabled

The Crystal Cavern is an extremely dangerous dungeon that is the second part of the Abandoned Mineshaft, with the Fungal Cavern being the first. Like the first part, the dungeon is a source of Life Potions, assorted Greater Stat Potions, T14 Armor, and numerous untiered items. In addition, three pieces of the Crystal Kunoichi ST Set can drop here.

The portal drops from the Crystal Worm Mother, the boss of the Fungal Cavern, at a guaranteed rate.


Crystal Cavern Key The Crystal Cavern Key is unavailable for purchase.

The Realm Eye says:
Steamhammer’s Mining Co. began an ambitious operation to dig deeper beneath the realm than any humanoid had ever gone.
Surpassing even the depth of other subterranean manmade feats like the Toxic Sewers and Lost Halls, this enormous mineshaft extended nearly to Shaitan’s personal domain.
But Steamhammer’s gang pushed their luck and encountered an unexpected threat dwelling far beyond normal reach.
At first, the miners were able to make some amount of peace with the puzzling mushroom tribes. The dwarves were allowed to continue undisturbed and even engaged in some trade.
After a few weeks, the dwarves uncovered a chamber packed with more valuable ore than the entire realm had ever known to possess.
Eager to begin the haul, the dwarves started to chip away at the abundant crystals. But with a single strike of a pickaxe, the passive mushroom tribesmen were sent into a ravenous frenzy.
The miners were chased out of the cavern in a panic. Many were lost, and the survivors remained unsure of exactly what flipped a switch among the tribesmen.



The dungeon is a sprawling network of caverns filled with dangerous enemies. Each room is a randomly chosen premade shape, but the layout is procedurally generated. Rooms contain dark purple floor tiles and irregular, light blue walls decorated with colorful crystals. Some rooms may contain wooden floor tiles with mining implements. Scattered throughout are stalagmites and various colored crystals serving as decorative objects. The boss room is a large, pentagon-shaped arena with a light blue, crystalline border, in a lake of impassable Crystallised Water.

Similar to the Fungal Cavern, the way to the boss is initially blocked off - players must find and destroy 25 Cavern Crystals in order to power up the Dwarf Miner’s drill and pave the way to the boss. There are always exactly 5 rooms in-between the starting room and the drill room (excluding both rooms).

There are more than 25 Cavern Crystals in total, meaning that it is optional to explore the whole dungeon, however, once the drill is activated and at least 1 person enters the boss room, all players within a certain radius will either be teleported beneath the boss to begin the fight or disconnected (if the player is standing on the bridge water when the bridge closes). You do not need to be in the boss room to still be teleported below the boss, meaning you can sit in the drill room or a few rooms away and you will still be teleported. However it is worth mentioning that the radius in which you will be teleported is not infinite, so you may still get disconnected if you are far enough away.

Example Layout


Screenshot 1 Screenshot 2

Crystal Entity Crystal Entity Final Phase

Back to top


Crystal Bats

Crystal Slimes

Crystal Monsters


Dungeon Boss

Crystal Guardians

Back to top

Drops of Interest

Back to top

Tips and Strategies

Due to the very high difficulty of the dungeon, organized runs (via keys) are widely considered best for completing it safely and efficiently. Fungal Caverns which drop from the Dwarf Miner event are rarely completed. The main source of organized runs is the Fungal and Crystal Cavern Discord server.

Back to top