This is the 3rd version of a Bene Gesserit class I've posted, with each version becoming progressively more streamlined. This uses the excellent suggestion by Talysman to use the Cleric's turning mechanics for things other than turning undead. In this case we'll use it for "The Voice".
Bene Gesserit Sisterhood
Cleric Sub-Class
The Bene Gesserit are an exclusive sisterhood whose members train their bodies and minds through years of physical and mental conditioning to obtain superhuman powers and abilities that can seem magical to outsiders. Sometimes called "witches" due to their secretive nature and misunderstood powers, the Bene Gesserit are loyal only to themselves. However, to attain their goals and avoid outside interference, they often screen themselves with the illusion of being loyal to other groups or individuals.
Unarmed Attacks: d6 damage
Unarmored AC Adjustment: +3 [-3]
Cleric Spells
Can only cast spells that affect the character directly.
Cleric Turning
Affects humans instead of undead. A "T" means the character can Tell the target to perform one action. A "D" means the character Dominates the target for as long as they concentrate and take no other actions.
Special Weapon
Gom Jabbar - No Damage, Save vs Poison
Like the previous version for Swords & Wizardry you could modify how often some of the spells could be cast if you like, but I appreciate how straightforward the write-up for this version is.