Hey! could someone help me with understanding the Necromancy rules in Bloodlines the Resurrected?

Quicken Corpse (••••) Target number of successes: 8 Material Focus: An intact humanoid corpse. The vampire touches a humanoid corpse and imbues it with necromantic power, animating it and creating a mindless but obedient follower. This creation is effectively a “free” Retainer with a rating equal to the rite’s Potency, with a “field” mostly encompassing manual labor and basic forms of violence. Zombies do not suffer wound penalties and cannot heal damage naturally....