Of course, Marxism is an example of what Carl Popper would have called a 'World Three' structure, in that it's got immense power as an idea, but you couldn't actually hold up anything in the world and say: 'this is Marxism'.
Magic is a state of mind. It is often portrayed as very black and gothic, and that is because certain practitioners played that up for a sense of power and prestige. That is a disservice. Magic is very colorful. Of this, I am sure.
Art makes us feel less alone. It makes us think: somebody else has thought this, somebody else has had these feelings.
I think that we need mythology. We need a bedrock of story and legend in order to live our lives coherently.