Ok. This would have been in late August/early September of 1985. I was living in Bradenton, FL, and WTOG would show movies on Saturday afternoons featuring Dr. Paul Bearer, Creature Feature. It was around Labor Day weekend because we were home from school due to Hurricane Elena.
The movie was something about a girl with long dark hair, worshiping some sort of idol, she gets stabbed in the lower back as some sort of sacrifice while naked. There might have been some sort of bunker/temple involved, I just remember the idol set in an alcove with a light shining down on it and the woman standing in front of it.
This is incredibly vague, hope y’all can help!