Deep down in the kirigakure lake, through a series of tunnels, you will be brought to a large underground grotto. The grotto is lit by millions of algae that glow in the dark as well as a prehistoric bird that shines brightly in the darkness. In this grotto is the Sanbi, the three tails demon. He is here for any to conquer and subdue, however it would take a seal master to seal him in anyone.