Terror Train

Terror Train is a 1980 CanadianAmerican horror film directed by Roger Spottiswoode and starring Jamie Lee Curtis, Ben Johnson and David Copperfield. It follows the members of a college fraternity who played a cruel prank on a shy kid named Kenny Hampson three years ago. They are having a costume party on a train unbeknownst to them, someone has boarded the train with them and is killing them all one by one.

Three years later the members of the same fraternities and sororities hold a New Years costume party aboard a train. Class clown Ed is disguised as Groucho Marx. Prank ringleader Doc Manley is disguised as a monk. Jackson is disguised as an alien lizard. Docs girlfriend, Alanas best friend Mitchy, is disguised as a witch. Alanas boyfriend Mo is disguised as a bird. Also along are Carne, the train conductor, and a magician hired to entertain the crowd.As the train journeys into the icy wilderness, the students responsible for the prank are murdered one by one, with the killer assuming the mask and costume of each murder victim in turn. Carne discovers some bodies and sequesters the students in one car as the train begins its return journey. Alana recalls the prank, and, remembering that Kenny loved magic, suspects the magician is the killer. However the magician has disappeared, and is eventually found impaled inside his sword box. ........

Source: Wikipedia