The Roar Of The Monster

You hear a big ROAR! Your friend Polly is terrified and runs away. The mist around her head looked just like the mist that was around the heads of the previous five people that you had seen before. Despite the roars coming from the mist, you choose to use your canoe to paddle out into and through the mist to get to the other forbidden island. Before you do, one of the white, fluffy clouds in the sky becomes big, grey, and grumpy. What is going on?