A Mord-Sith is selected from the gentlest and kindest girls in D'Hara and is trained from a young age on three levels. Each time, she must be "broken".
- The First breaking is a time during which she is tortured to the point of obedience so strong that she would do absolutely anything her mistress tells her. This part of the training breaks her of her sense of self and personal desires.
- The Second breaking, she is forced to watch as her teacher slowly and brutally tortures her mother to death . This is to break her of compassion (this part of training does not seem to happen in the tv show).
- The Third, and arguably the most difficult breaking, is when she is given the instrument of torture and must inflict pain and suffering upon her own father until she finally kills him.
- When she has completed this task, the Lord Rahl gives her the magical ability to redirect the magic of anyone who uses magic against her. Mord-Sith also have the ability called the Breath of Life.
Mord-Sith have the ability to turn a person's magic against them allowing them to redirect magical attacks. They can also reflect a magical weapon back at the user, as shown by Denna and Cara. They can endure a heavy amount of damage thanks to their training. They use the Agiel to inflict pain on their opponents which can kill them. They can also use the Breath of Life, as the name says, a Mord-Sith breathes life into a dead body and the person that died will come back in perfect condition. However, this only works if the body is still warm. If a Mord-Siths becomes a Baneling they can't use the Breath of Life.If a Mord-Sith is confessed they will die a slow and painful death thus making Confessors and Mord-Sith mortal enemies.