The Pirate Cave Key open Pirate Cave dungeon.
The Pirate Cave is an very low-level Dungeon designed for weak (level 1+) characters. The enemies and boss all have low health and damage output for this purpose. This dungeon is the only source of Pirate Rum and one of the two sources for the First Mate’s Hook, a piece of the Pirate King Warrior ST set.
Entrances to the Pirate Cave are commonly dropped by Pirate, Piratess, Green Gelatinous Cubes, Red Gelatinous Cubes, Purple Gelatinous Cubes, Forest Nymphs, Giant Crabs, Sand Devils and Goblin Warriors.
This dungeon must be completed to earn the ‘Tunnel Rat’ fame bonus.
The dungeon has a much more difficult version called the Deadwater Docks.