Who is the god of this world? Satan – devil. Adam sold us out, but Jesus came to redeem us back with his blood.

But if our gospel be hid, it is hid to them that are lost. In whom the god of this world has blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them; 2 Cor 4:3-4.

When you are in Christ, you have authority over the god of this world.