Thematic Bible: The last enemy that shall be destroyed

Since then the children have partaken of flesh and blood, He also Himself likewise partook of the same; that through death He might destroy him who had the power of death (that is, the Devil), and deliver those who through fear of death were all their lifetime subject to bondage.

for it is right for Him to reign until He has put all the enemies under His feet. The last enemy made to cease is death. For He put all things under His feet. But when He says that all things have been put under His feet, it is plain that it excepts Him who has put all things under Him. read more.
But when all things are subjected to Him, then the Son Himself also will be subject to Him who has subjected all things to Him, so that God may be all things in all.