ROTMG The Crystal Cavern Key x8
The Crystal Cavern Key open Crystal Cavern dungeon.
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.