The Voice

The Skill known as The Voice is a talent taught secretly among the
organization known as the Bene Gesserit in so called "Un-civilized
Space". In this particular area of Uncivilized space, major
intergalactic houses feud with one another within a loose alliance.
The Bene Gesserit, an all female secret society, manipulate all those
around them while taking the posture of being uninvoled. They are
widely regarded as "witches" and not trusted very far. The voice is
one of their abilities which give them power. When issuing a simple
command using The Voice, a victim finds themself very hard pressed to
disobey. It uses  mental discpline and force of will to use The Voice,
as well as extensive training, however it's one of the first things a
Bene Gesserit Adept learns. it is closely guarded in it's teaching though.

The Voice (Cha)
Pre-Requisites: Will +5, Command +5
Effect: This ability is used to force a charachter to do the command
issued by the user. The Check for this skill is the same as Affect Mind,
Pg. 84, SWCRB, 1st Ed. This may only be used with simple commands.(eg.
'stop' 'untie me' 'throw down your weapon')
Vitality Point Cost: 4