The Oubliette of Suffering is the fourth labyrinth in The Pirate's Curse. It's located on Mudbog Island and is where Shantae acquires Risky's Boots.
In order to access the labyrinth, Shantae must have the Manly Musk, obtained by the mighty warrior who appears when the Hopeful Flame is lit.
Golems can be found in some areas of this labyrinth. The puzzle of this labyrinth focuses on manipulating three cages to move up and down via switches. The boss of the Oubliette is Dagron (Massively Misspelled Monstrosity).