"Although Satan has power and authority in the current world system in which we exist, his power is limited, always under the sovereign control of God (Job 1:12), and it is temporary (Romans 16:20). God has not revealed all of the whys and whens concerning Satan's rule, but He has made it clear that there is only one way to escape the power of Satan's dominion, and that is through His Son, Jesus (Acts 26:18; Colossians 1:13–14). It is Jesus who, speaking of the impending cross, declared victory: "Now the prince of this world will be driven out" (John 12:31)."
https://www.gotquestions.org/prince-power-air.html 
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