Cornelius Sigan was the greatest sorcerer Camelot has ever known.
Biography
Early Life
It is said that when he was alive he could turn the tides, change day into night and even helped build Camelot itself. His life's mission was to defeat death and he swore to one day return from the grave. Sigan became too powerful and the King at the time ordered him to be executed. Before his death, Sigan cursed Camelot, saying that he would one day return and raze the city to the ground. It was said that he didn't want his wealth and power to day with him and worked on a way to cheat death.
Return
This was revealled to be true hundreds of years later. After Camelot workers uncovered his tomb, a thief called Cedric worked his way up to a position in the Royal Household and used this to enter the tomb. He intended to steal Sigan's riches and jewels but found a large blue heartshaped jewel. The jewel contained Sigan's soul and he possessed Cedric, he then started an attack on Camelot but Merlin managed to defeat him thanks to the help of Kilgarrah, and Uther sealed up the vault where the tomb and soul of Cornelius Sigan lay. (The Curse of Cornelius Sigan)
Behind the scenes
Cornelius shares similarities with the character of Lord Voldemort from the Harry Potter series by JK Rowling.