If Link passes by the Moblin's Keep, the Great Moblin spots him and proceeds to fire cannons at him. The interior of the Moblin's Keep is accessible once Link has obtained the Flippers. Once inside, he battles the Great Moblin and must defeat him by throwing back bombs thrown by him with the Power Bracelet. Once the Great Moblin is defeated, the entire keep crumbles, leaving nothing but rubble and a Treasure Chest containing a Piece of Heart. The Great Moblin and his minions then spend the rest of the game making bombs within a house in Sunken City.