Lady Terminator (1989) on Netflix

Plot summary

An old legend tells of the South Sea Queen, who took men to her bed and then let a serpent hidden in her body destroy them. One man caught the serpent, and it became a dagger; she cursed his future great granddaughter in return. An anthropologist, Tania, goes looking into that legend and dives down to where the Queen lies. The Queen takes her over, and Tania goes on a rampage. A New York detective, Max McNeil, works the killings and meets Erica, the cursed descendant, who wants a career as a pop singer.