Moral realism

At first glance, I thought that in such a situation I would be in a dilemma between the duty to obey him and the moral duty. But the latter does not exist without a command. So apparently I was supposed to listen to him. Beyond that, if he had chosen to enact evil, then perhaps I would not be obligated to him. Then I would not be obligated to good because there is no command, nor to evil because the source of the force has lost its authority. But this is probably an ill-defined discussion. It's kind of like asking what would happen if the triangle were rectangular. A complete being who created our world cannot legislate evil (maybe theoretically can, but in practice it won't happen).