In this situation, I could see it being done in order to announce that you have the power to alter reality on a whim, and really need people to get with the program.
So I would say it would depend on your other intentions, as if you have the creative power that is chested, you could easily bring someone back to life and place them in another scenario until they actually understand what you’re trying to tell them.
I don’t have enough information to ascertain whether or not the omnipotent being is evil or just a prankster.