Then cometh the end, when he shall deliver up the kingdom to God, even the Father; when he shall have abolished all rule and all authority and power.

Then the end will come, when He hands over the kingdom to God the Father after He has destroyed all dominion, authority, and power.

then--the end, when he may deliver up the reign to God, even the Father, when he may have made useless all rule, and all authority and power--

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.