This ability replaces the Accursed Specter warlock ability.
Starting at 6th level, you can curse the soul of a person you slay, consuming it within Kha'Mel. When you slay a humanoid and choose to consume their soul, you gain temporary hit points equal to your warlock level and can use both Strength plus Charisma or Dexterity plus Charisma to your attack and damage rolls for one minute.
The target is immune to all resurrection effects unless Kha'Mel is destroyed.