For most kids, the worst enemies school has to offer are cranky teachers, excessive homework and maybe a bully or two for good measure. But for Harry Potter, each new school year at Hogwarts brought a new wave of villains hell-bent on taking the life of the Boy Who Lived.

With help from our friends (and the best Potter experts on the interwebs) at The Leaky Cauldron, we're counting down the 10 greatest villains in the "Harry Potter" movies. From snooty wizards like Draco Malfoy, to He Who Must Not Be Named himself, find out if your favorite baddie made the cut.