Deathlocks were undead spellcasters bound to serve a master. They were usually the remains of warlocks, reanimated by their patrons after failing to fulfill their part of a pact, but could also be created by necromancers. They did possess any of the goals that they had in life, aside from fulfilling their patron's desires. This urge to serve their patron was overpowering and consumed their every thought.
There was a vast variety in the appearance, capability, and danger of the deathlock, as any Mortalkind or Giant-kin warlock could be made into one. Their combat power and known Spells typically mirrored what they possessed in life. Most had a rotting undead body reminiscent of a Zombie or Skeleton, though some Wights and Vampires could become deathlocks as well.