|“||Concilium. Commonly only known to the public as mind control. It's a tricky little craft. When properly exercised, it can bend the strongest of wills to your desire.||”|
|— Myrtle Snow[src]|
Concilium is the ability to control another's mind through sheer willpower, allowing the one performing Concilium to control their actions, memories, thoughts, etc. It is one of the Seven Wonders, meaning all Supremes are expected to have mastery over this ability. It is the most often used ability after Telekinesis.
Similar to witches, beings afflicted by an unknown blood virus have proved to be skilled in various degrees of mind compulsion, though vampiric abilities have never been classified or explained in the same way as witches' powers.
Concilium is the art of imposing one's will into another. Myrtle Snow stated that the sharper a person's mind, the more effort it takes to control them, but a person skilled in Concilium can break any mind. It is possible to try and resist it, though doing so causes increasing intracranial pressure, as shown when Fiona Goode tried to hypnotize a police officer and he refused, but it can lead to a build-up of extreme pain in the brain and can be fatal. It also can control their thoughts, memories, and feelings.
Fiona showed Madison Montgomery how to perform it when she became her protege. Madison managed to hypnotize a man into standing in the middle of a road. She was later shown to be very skilled in the ability during the Trial of Concilium.
Nan was also shown to have developed Concilium, when she very nearly forced Madison to stick a cigarette up her vagina, and when she later murdered Joan Ramsey by hypnotizing her into drinking bleach.
The young candidate for Supreme during the Seven Wonders skit was able to make another witch walk around like a chicken.
At the Trial of Concilium, two people stood opposite each other and each was given the chance to control the other. Misty Day and Queenie were partnered up, with Misty making Queenie slap herself several times and Queenie forcing Misty to pull her hair. Zoe and Madison were much more violent. Madison first forced Kyle to drop his tray of wine glasses, to anger Zoe, and then forced him to kiss her whilst making Zoe slap herself, then forcing Kyle to lick her boot whilst Zoe watched. In return, Zoe forced Kyle to break free from Madison's control and kiss Zoe, but out of anger, Madison forced Kyle to choke Zoe. The fight was ended when Cordelia telekinetically threw Kyle across the room. Cordelia, during her own test, made Queenie perform a tap-dancing routine much to everyone's laughter.
In the Apocalypse, Michael Langdon was seen demonstrating this ability on the Test of the Seven Wonders, forcing Zoe and Madison to dance together. Later in the series, Myrtle used this ability to make Grand Chancellor Ariel Augustus and Baldwin Pennypacker feel tired and sleepy. She later uses this ability by reciting a spell on Ms. Venable, and made her think blank and submissive. And to Jeff Pfister and Mutt Nutter, when she immobilized them in order to blackmail them into giving Coco St. Pierre Vanderbilt's family a spot in Outpost 3.
- Concilium is featured in five seasons of American Horror Story: Asylum, Coven, Hotel, Roanoke and Apocalypse.
- Cordelia's vision in "Boy Wonder" implies that zombies are immune to this ability, as they are mindless.
- Episode: Checking In
- Episode: Bitchcraft
- Episode: Boy Parts
- Episode: Burn, Witch. Burn!
- Episode: The Magical Delights of Stevie Nicks
- Episode: The Replacements
- Episode: The Seven Wonders
- Episode: The Sacred Taking
- Episode: Chapter 3
- Episode: Chapter 7
- Episode: Chapter 4
- Episode: Boy Wonder
- Episode: Apocalypse Then
- Episode: Traitor
- She was a Supreme, therefore she had to have this power because it is one of the Seven Wonders
- Episode: Go to Hell
- Episode: The Name Game
- Episode: Mommy
- It is presumable that the Old Gods have this power as they are able to presumably bestow Scáthach this power