The Legend of an Exit

There's a legend of an exit which, if stimulated properly, expands. We have to dance together to coax the opening to widen for us to pass through. I've tried to summon squirrels, but there's no squirrels inside the infinite fish. Let me try it then. The three of us have only danced in the shape of square. Seize in your. Wait, wait. What is your secret, O.Y.s woman, to stimulate the tunnel wide? You see a blue round tunnel. It seems to get smaller and smaller. Like... Sorry? Can you take your spears and just like stick them up, right? So, the tunnel can't close? Well