User blog:Monkey d strawhat/Demons in one piece

As the title says this Blog is about wether are not demons are in the OP world. We have seen giants, people with wings, talking animals and also the Devil Fruits so why havent we seen anything supernatural and i am not talking thriller bark because the zombies and ghost were caused by DF. Maybe Oda isnt going to use demons or ghosts in the story or he is saving them for somewhere in the NW idk.

So what do you think