Lord Voldemort, also known as Tom Marvolo Riddle, is the incarnate of evil and sworn enemy of Harry Potter. He is feared so much in the wizarding world that he is simply known as 'He-Who-Must-Not-Be-Named'.
He is the leader of the Death Eaters, a group of evil wizards and witches dedicated to ridding the Wizarding World of Muggles and establishing Voldemort as its supreme ruler.
"I'm going to sit here and watch you die, harry POtter. Take your time. I am in no hurry." Lord Voldemort