Order of the Black Moot

The Order Of The Black Moot is one of the Orders Minoris of the Adepta Sororitas that was founded during the Betalis III Campaign. The order is comprised of Sister-Pariahs, not unlike the Sisters of Silence, but is dedicated to the complete destruction of the Eldar. They are mysterious and wear intimidating armor that enhances their mystique. From their frozen haunt they fly, often unannounced, to battle where the Eldar are present.
=== Betalis III Campaign ===
The Black Moot was probably founded earlier than the Betalis III Campaign but Imperial records first record them being in a communications relating their dispatch to aid the forces there. They had been initially dispatched as part of a plan to move the armor of Phoenix Lord Irillyth but, when the Eldar outmaneuvered their plans, they became entrenched on the ice world during the long battle.
The small order fought to defend the armor and protected the faithful. Acting on orders of the  Adeptus Ministorum the order acted covertly to guard a vault of sacred artifacts the Ecclesiarchy had secreted there. The entire order was thought wiped out when the building they were defending collapsed under heavy bombardment and plunged them into a deep crevasse. They later emerged, relics in tow, and saved them from many Eldar incursions for the remainder of the campaign.
=== Disposition ===
The Order itself is very secretive, even amongst the Adepta Sororitas. Their ways and true disposition are known to few and it seems that they covertly encourage their air of mystery. They are ruthless, faithful, immensely superstitious, and heavily invested in the rituals of the Adeptus Ministorum. Still, they keep their own council and infrequently interact with others except when called to battle. There are whispers that they have fallen to Chaos or that their “secret practices” are perverse and indecent acts. Still, they have never been formally investigated and their seclusion makes it unlikely that they will be in the near future. The Order of the Black Moot has a particular hatred for Eldar and does not make a distinction between Craftworld Eldar and Dark Eldar. They will often arrive on battlefields where Eldar forces are engaged unannounced and throw themselves into the battles.
=== The Black Coven ===
The Black Moot’s coven is on a small, oblong, island in the middle of the frigid seas of Betalis III. Much of the structure is underground and arriving on the desolate spot is difficult. Flights overhead have to deal with difficult wind conditions and frequent blizzards. The raging, icy, seas prevent boat travel to them. They are such an infrequent sight on Betalis III, many who live there believe them simply to be a myth.
=== Armor ===
The Sisters of the Order of the Black Moot have very distinctive Orange and White armor which they adorn with many trappings. They often decorate their armor with fur, horns, and runic wards. These wards are simply aesthetic but add to their intimidating appearance. When one is a Null others fear you and they add to this mystique intentionally. Their goal is to appear as fearsome to their foes as possible and many psykers take the sign of the warding to heart.
=== Other Notable Campaigns ===
* The Battle of 3rd Ridge: A local system was in peril from a chaos incursion. The Order was the closest Imperial forces other than local guard regiments. The bloody fighting set many superstitious about the Order of the Black Moot and they have been banned from entering that system every again by order of the governor for unknown reasons.
* The Trinary War: Eldar from the Craftworld Zhforan were engaged in a deadly raid on a Dark Eldar stronghold when the Order of the Black Moot attacked both forces. The larger Dark Eldar warhost took advantage of this and caused major casualties to both the sisters and the eldar from Craftworld Zhforan. To this day the first Canoness of the order is still a slave fighting in one of their gladiatorial pits. She has not broken and has slain all those who they pit her against.
* The Shavin'do Campaign: The Sisters of the Black Moot located and waged war against one of the smaller craftworlds. They fought room to room and exterminated each and every eldar. The eldar of Craftworld Shavin'do are said to still haunt the sisters and the entire order has been cursed as a result of this campaign. During this campaign they were aided by Psyker-Priest Thurge who became an unofficial member of the order.
* The 4th Impailer’s Crusade: When a powerful psyker and hero of the Imperium, Psyker-Priest Thurge was appointed to the position of cardinal over the Serovia system a civil war broke out in protest. Order was enforced by Imperial Guard forced primarily composed of a few dozen of the Somnium regiments. The civil war reached a whole new level when the Black Orthodoxy chapter showed up and demanded Psyker-Priest Thurge’s head and Thurge’s old allies took exception to this. The so-called “4th Impaler's Crusade” saw the Black Orthodoxy do battle against the Tallarn Redeemers and the Order of the Black Moot who sought to defend Thurge from their impaling power-spears. The Imperium was divided on who they should back so mixed messages were sent and backing was given to no side in particular. The bloody civil war ended when Psyker-Priest Thurge took his own life by drinking poison after leading mass one last time. He did so in front of hundreds of thousands of his followers and many say he ascended to join with the Emperor.