A woman is possessed and it is a woman who was murdered. Scenes remembered: She goes back and forth from the present time to her past life and there are these scenes, one where she does a graphic Satanic ritual with a goat, another scene that is not a flashback is where she bites the head off a frog. The woman is a upper class, high society rich lady and her father tries to get her help.
“The Antichrist” (Italy; 1974)?
Also called L’anticristo.
Click on the link below to view the trailer from YouTube.
https://youtu.be/YeYr6YuqvDY