The Loreley's Grasp (Las Garras de Lorelei) is a 1973 Spanish horror drama film. It features Tony Kendall, Helga Liné, Silvia Tortosa, and Josefina Jartin. The legendary Loreley has been living for centuries in a grotto beneath the river Rhein in Germany. Every night when the moon is full, she turns into a reptile-like creature craving for human blood. When one girl after another of a nearby boarding school is killed by her, a hunter named Sirgurd is engaged to kill the monster.