The Pirate Cave is an easy and low-level dungeon, which was added in Build 74 and one of the first two dungeons to be added to the game. Being one of the most common dungeons in the game and by far the easiest to complete, it perfectly fits for beginners.
You may also access the Pirate Cave by purchasing it's key in the Nexus for 50 gold.
Dreadstump the Pirate King
Dreadstump The Pirate King is the boss of the Pirate Cave. He is found in a large, circular room and will be surrounded by minions.