Luke was sired sometime prior to 1843 when he lost a fight to an enemy who caught him sleeping. He claimed he had not lost a fight since that time, earning such a reputation that the Master considered the fact that someone had survived a fight with Luke as strong evidence that the individual was a Slayer. In 1997, Luke was chosen as The Vessel for The Master, where he would feed on victims and thus channel their strength into the Master in preparation for his escape from his prison. During the Harvest, he fought and was killed by Buffy Summers when she caught him off-guard by shattering a window and yelling that the sun was out. Luke instinctively attempted to shield himself, despite the fact that the sun was not due to rise for another nine hours, allowing Buffy to catch him off-guard.
Powers and abilities
"Luke is the Vessel! Every soul he takes will feed me."
Luke possessed the regular powers and weaknesses of common vampires. Due to his advanced age, however, he was stronger and more agile than other vampires, thus capable of holding his own against a Slayer.
After becoming the Vessel, Luke shared a mystical link to the Master, which allowed the Master to draw strength from each person Luke fed on during the Harvest.