The name of fire

Our country is being invaded by an enormous horde of goblin-like creatures. As they sweep in across the land, I discover the name of fire. I go into the midst of the enemy army, speaking the name of fire. It leaps out and devours the goblins and everything else. I find myself hiding in a barn until the fires are done raging outside. In the barn are a number of books lying on the floor. One of them has a bright cover with a clown on it. I know I mustn't open it, because it contains a different dream that will break through if I do - and I can't go on to the next until the goblins are all dead.