If the one I am think of and the on bucket in the burrow to my knowledge. If you know where rage fang is then instead of going down for the third time to the boss you go left you should of killed the third snake there. You go down and follow that path you will meet like two snake along the way. Make sure not to go down if you want to reach the bucket. Another thing if you do a rage fang group after the boss is dead just follow the other people so you know the way.
