The Loreley's Grasp (1974)

The legendary Loreley of local lore lives in shadow, lurking somewhere near the river. When the full moon hits, Lor transforms into a rabid reptilian with a rapacious appetite. So goes the spooky story of The Loreley's Grasp (1974), Amando De Ossorio's B-grade screamer starring Tony Kendall and A-plus looker Helga Liné as Loreley. Tony, hired by a local girls' school to protect the students after Lor comes ashore once more, goes on the hunt for this bewitching beauty-turned-brute. Meanwhile, he gives his heart to a schoolteacher—but will they be able to stop the monster before it takes a few hearts of its own?