The last enemy that is annulled is death.

Verily God will smite the head of his enemies, the hairy scalp of him that goeth on still in his trespasses.

Then the end, when he gives up the kingdom to him who is God and Father; when he shall have annulled all rule and all authority and power. For he must reign until he put all enemies under his feet. The last enemy that is annulled is death.read more.
For he has put all things in subjection under his feet. But when he says that all things are put in subjection, it is evident that it is except him who put all things in subjection to him. But when all things shall have been brought into subjection to him, then the Son also himself shall be placed in subjection to him who put all things in subjection to him, that God may be all in all.)

{Psalm of David.} Jehovah said unto my Lord, Sit at my right hand, until I put thine enemies as footstool of thy feet.

For David has not ascended into the heavens, but he says himself, The Lord said unto my Lord, Sit at my right hand until I have put thine enemies to be the footstool of thy feet.

But as to which of the angels said he ever, Sit at my right hand until I put thine enemies as footstool of thy feet?