_**Better titled “The Sorceress” or “Demon of Vengeance”**_ After a horrible crime, a young woman at a SoCal university (Elizabeth Kaitan) consults a practicing witch (Lois Masten Ewing) and the perpetrators start dying one by one. "Necromancer" (1988) combines the plot of “I Spit on your Grave” (1978) with the tone of “Christine” (1983) and the deal-with-the-devil angle of the future “Shock ‘Em Dead” (1991), not to mention the colorful effects, which smack of (fun) 80’s cheese. It lacks the grim seriousness of “I Spit” and isn’t as effective as the latter two, but it has its entertaining…