It depends on what that God represents because in fiction and religion as well as mythology our gods tend to be different. If it's the Greek gods expect to be transformed into an animal and get consumed by your dogs, eternal torment within Tartarus in the form of a ironic punishment, plagues, and my favorite Pandora's box which contained all the evils of the world or to have your liver pecked out by an eagle like our good old friend Prometheus. You could also get cursed to only admire your reflection till you perish. If it's the god of storms expect natural disasters to be quite common. But for the actual God who made everything even the seas ,if you wanna know the rage of an Omnipotent God ,the one true God then look at revelations and most of the old testament. Remember he ain't just a god of love but of justice.