The name's power is insurmountable, while the name might have limits as every other name since Neshamah has opened a gate to a hell then his power is unlimited able to throw all of his force of undead at his enemies. The name's power is only limited by the amount of bodies it can control thus it must harvest the living on a routine bases.
The dead king plays the role of a ruler, but one that thrives on total control. As the dead are only an extension of the one that controls them the rules is incredibly isolated for the world around but extremely paranoid thus they create more and more obstacles from enemies using their powers. The name seems to inspired by the isolation and terror that the Dead king causes.
The Dead king posses the ability to control undead more significantly than other villains. This means that not only can he control a greater quantity but a greater quality of undead. This ranges from an average hordes of skeletons, to intelligent husk of former commanders, and unique name that still possess both their skills and memories from the past that act independent of the dead king's control.