Create willing undead

When the ritual is complete if the creature is willing to be revived as an undead, they are revived. When a creature returns it has its levels, hit dice, equipment, etc, intact. If the creature is unwilling, the spell does not affect them. However, that creature only receives half as much healing from healing spells, this is permanent. They gain the undead fortitude perk that a zombie has. The creature no longer needs to eat, sleep, or breathe. But can only receive the benefits of a long rest by an 7-8 hour rest.