Yes, because repairing a giant timepiece requires a lifetime oath and combat ability with medieval weapons.
Ok. Quick rundown: Dethklok is the name of a group of musicians, a band. They play a style of music called "metal." They are the best metal musicians in any universe. Those who serve Dethklok are called Klokateers. We keep people from killing them and we perform various other tasks; whatever our masters need.