Jesus is King of kings and Lord of lords. (Rev 19:16, 1 Corinthians 15:27)
Rev 19:16 And he hath on his vesture and on his thigh a name written, King Of Kings, And Lord Of Lords.
1 Corinthians 15:27 For he hath put all things under his feet. But when he saith all things are put under him, it is manifest that he is excepted, which did put all things under him.
Jesus destroyed the devil and conquered the world by doing the work of Christ on the cross. (John 6:33, 1 John 3:8, Hebrews 2:14, Revelation 17:14)
John 6:33 For the bread of God is he which cometh down from heaven, and giveth life unto the world.
1 John 3:8 He that committeth sin is of the devil; for the devil sinneth from the beginning. For this purpose the Son of God was manifested, that he might destroy the works of the devil.
Hebrews 2:14 Forasmuch then as the children are partakers of flesh and blood, he also himself likewise took part of the same; that through death he might destroy him that had the power of death, that is, the devil;
Revelation 17:14 These shall make war with the Lamb, and the Lamb shall overcome them: for he is Lord of lords, and King of kings: and they that are with him are called, and chosen, and faithful.