what is the merits. the substance can be fabricated by our imaginations or real. For example all men are animals and so are living beings. And in the fantasies some come up with all sorts of different characters or heroes of fairy tales or cartoons. Here it can be considered a creature. also to include the inhabitants of the other world, ghosts, ghosts, and aliens because there are still different opinions and it is not yet clear aliens really exist or is someone's imagination, although there are some findings confirming them.