I can speak on this one.
My soon to be ex used to blame me for items that were not in either of our control. Items like the bills are too high or why isn't the new grass seed growing.
I was called a moron numerous times or genious, but my soon to be ex also physically abused me as well.
The big issue I have with emotional abuse is manipulation. I can't tell you the amound of times, I would go out of with my friends and ask my ex if she would like to go and she would say no and then I would say, well is it OK if I go then and I would get the you can do whatever you want. When I would get home, the environment would be hostile, what did you do? where do you go? who were you with? you smell like smoke? did you smoke? where their any girls there? why are you coming home so late? I did all these things while you were out having a good time.
The last one was the hardest for me, strictly laid out as a guilt trip.