The Mysterious Den[[:File:|[, ]]] is located in Red Stone Run, the last cave out of three caves. It is south of Kukuru's Grotto, directly beneath the bridge connecting The Blazing Way and Firewalker's Path. Due to spawn timers, the cave is either open or blocked by rocks. If there is a cave-in, you need to use one of the items from Timeless Legends to clear the rocks.