Nzambi is a killer who collects Command Spells by cutting off the hands of Masters. She planned to release her zombies across the entire city.
Nzambi is able to raise dead as zombies with Voodoo due to her name being related to the origin of the word "zombie". This is even able to affect Servants, as shown with Hannibal. The zombie infection can spread through physical contact with someone who is already a zombie.