von Reinherz, Klaus

The sealing power he owns is to seal away vampires only under a certain condition: knowing the vampire's real name.

Klaus is also very intelligent, being able to play the game "Prosfair," the complexity of which is known to drive humans mad (Klaus himself begins to bleed internally after playing the game for 99 hours without a break) and is a game usually reserved only for one distinct species in Hellsalem's Lot that has studied it for a thousand years.