Raise a single corpse
Another is Army of the Dead, which allows them to summon a legion Sword of the New World money of ghouls to attack everything in the area. While on a long cool-down, it does allow for a big damage boost when fighting through an instance or raid boss. There is just something about watching an enemy being swarmed by ghouls that warms a Sword of the New World cold heart. Only a little additional help is required they can raise a single corpse as a ghoul to assist in a fight.