Gorpus

A giant scorpion-like monster who rampaged through the Wellspring Woods before Banon & Burrini sealed him in a huge stone jar in order to keep him from destroying the forest. Then, they created a huge stone barrier around that jar to keep it out of harm's reach. The whole area is then hidden deep within Manglewood's maze, and only Burrini knows how to navigate through it to reach the place. Unfortunately, the Sword of Earth (which Musashi needs) is also the lock on his prison.