There are 3 specialist lodges within the Mistwalkers.
The Siblings of the Herb - These are the Protectorates' master brewers of potions, members of this lodge are the only ones taught the most advanced and secret formulations and how to make them in the field from locally foraged materials. These potions may help the Mistwalker or their allies, or debilitate their enemies.
The Siblings of the Palm - Known as the Thieftakers, the members of this lodge are those who track down criminals and thieves, trained in tracking, infiltration, and of course how to subdue their foes or otherwise bring them to justice.
The Heralds - On the face of it the Heralds are the messanger service of the protectorate, but behind the scenes its members are trained to listen for the message between the words and, as they move around the courts and powerful of the world, to keep their eyes and ears open for, as the Heralds know more than anyone, information is power.
In the dark recesses of Angels and Demons, and in the shadows of the keeps and palaces of our enemies, there is a runour of a 4th lodge, one of death that strikes with a black blade. This lodge, if it exists, is a weapon of last resort, after all attempts at diplomacy have failed, to show that any who strike at the Protectorate mst be ready to suffer personal consequences, no matter how protected or far from the front line they feel they may be. One would not apply to join these Black Blades, if such an organisation exists it makes logical sense that only they would approach you. Of course no such lodge exists, you know better than to listen to rumour. Only one who places no value to their life would investigate further.