Hell is empty outside of the souls of the Sinners and lesser devil demons and fiends, whose intelligence is barely above animals and ruled by instincts and desires, and the empty throne of Satan.
With nothing holding you back, you claim the throne of the ruler of Hell. You gain a seed of Satan's power, and in time that seed will grow and grant you the full power of the Anti-God. Your full powers will be equal to those of God. You can create from nothing and reduce something to nothing.