Slave Curse

A slave curse is a kind of spell that is designed to not only signify that a person is a slave, but also, to put restrictions on them. The Slave Curse is meant to make it so that a person is forced to obey the orders of the person they are chained to, disobeying any orders given results in severe pain that can be the result of anything from an electrical shock to burns or even other kinds of torture including nightmares.
A person under this curse isn't able to travel far from their master, otherwise they begin to suffer from psychological and physical damage.
A slave curse is applied using Dark Water, and removed with holy water.