If God necessarily exists and is essentially omnipotent, then any accidentally omnipotent being would coexist with an omnipotent God, which is impossible.

Could an agent be accidentally omnipotent? At first glance, this appears possible, but there is the following argument for the opposite view. On the assumption that God exists, he has necessary existence, is essentially not temporally limited, and is essentially omnipotent. But there could not be two coexistent omnipotent agents. Thus, on the assumption that God exists, an accidentally omnipotent being is impossible.