These angels personify the Blessed Sleep and are associated with the Hunter's Moon season. They provide magic that wards against the desecration of dead humans. In the absence of Avacyn they remained the most active and continued on to reinforce wards that protected the human populations.
This flight of angels is centered in Thraben, and is instrumental in maintaining Avacynian wards. These angels reside mainly in the Lofts and are a familiar sight to the inhabitants of the city. They generally travel in small groups as they visit the centers of healing in the city. Alabaster angels also aid priests and cathars in maintaining the protective wards on the city walls and holy sites throughout Innistrad. According to the other flights, Alabaster angels tend to be overly sentimental, but they think of themselves as practical yet sympathetic. They often do not travel with weapons, preferring to use their magic, and engage in battle only when the conflict can't be resolved another way. During the archangel's absence, the Alabaster angels were first to recognize the Avacynian wards were failing. Many remained active - more than those of other flights - doubling their efforts to reinforce the wards. These efforts likely saved Thraben from the fate that befell many other towns and settlements.
Alabaster angels aided priests and cathars in maintaining the protective wards on city walls and at holy sites throughout the plane, and also aided Avacyn in conducting the spirits of the dead to their ultimate fate, dissolving into Innistrad’s Æthereal essence.