@ctl74 : I am soooo very sorry.
As far as taking your power back- you stiffen your lip and your spine and shut him out. His words and actions may hurt but you don't show it and you DO NOT engage. Contact a lawyer and first off PROTECT your financial assets!! My DD didn't have children so she blocked him totally. She moved out- they had separate bank accounts but she changed all of her passwords. We blocked him too. She would contact him when he needed to sign papers for divorce- he didn't show up for court- so decree was granted and she did her name change at the same time. Never heard from him ever again-took 3 months but as soon as the divorce was final- GOOD Riddance
I can't remember if you have kids- if you do- you never talk about him- good or bad- and don't show your kids you are hurt. Trust me when I say he will be grilling them for info - BUT you don't do that with your kids. You remain neutral and do not engage.
Be the turtle with the hard shell- he will bore of this quickly enough( narcissists MUST have an audience and victims) and move on. You want a clean break and eventually your hard exterior stance will be how you feel on the inside. Practice makes perfect