Crya

Crya
- The Blood of Vol's 13th Month, as they still use the oldest active calendar used on Eberron, the Qabalrin Wheel, which was developed when there was still a 13th moon in the sky.
A thirteenth mark, the Mark of Death, and a thirteenth moon, Crya, once existed. The Mark of Death was a dark mark devoted to necromantic abilities concerned with death and the undead. Most consider the thirteenth mark to be nothing more than legend.

A thirteenth moon, Crya the Dreamer, once existed that was associated with Dal Quor, the Plane of Dreams, and lay beyond the orbit of Vult, but it was destroyed some 40,000 years before the present day during the Quori-Giant War.

–40,000 Y.K. - The Giant-Quori War
"The Moon Breaker’s baleful power did succeed at driving the quori off of Eberron but nearly took all of Xen’drik with them. The eldritch machine’s activation destroyed Crya, the thirteenth moon of Eberron, and in the process severed the planar gate between the world and Dal Quor just as the Sul’at titans’ arcane loremasters had foreseen. As the moon disintegrated, the result was a planetary cataclysm that shook Xen’drik to its core and plunged large chunks of that continent beneath the sea. Mountains collapsed and gaping wounds the size of entire cities were rent open in the earth. The sun’s light was blotted out for a decade as portions of the shattered moon rained down from the sky for years, spreading the unspeakable devastation across the world. The physical connection between Eberron and Dal Quor was severed, perhaps forever."
excerpt from "The Collapse of a Giant Empire" - prof. Bertram Iridian, 863 Y.K.

The Blood of Vol
The Blood of Vol has also been around since long before the formation of the Kingdom of Galifar and thus does not use the standard calendar to mark their religious observances or the passage of time. The faith follows the oldest active calendar used on Eberron, the Qabalrin Wheel. Named for the elven civilization that developed it on Xen’drik millennia ago, it was the only calendar of record for much of Eberron’s early history. Like its present Galifaran counterpart, the Qabalrin Wheel is divided into months that correspond to the moons of Eberron, but unlike the Galifar Calendar, it still recognizes the thirteenth moon that was destroyed when the giants sealed off the plane of Dal Quor long ago. The Wheel has thirteen months instead of the standard twelve, with the last—Crya, associated with the equally lost Mark of Death—coming after Vult and before Zarantyr on the Galifar Calendar. This renders the Qabalrin Wheel year one month longer than the Galifar year.

-2200 Y.K.
At the same time as the Mark of Hospitality was emerging in the Talenta Plains, the Mark of Shadow and the Mark of Death appeared among the elves of Aerenal. It was at this time that the dragonmarked families of elves began to use the d’ prefix before their surnames (as in d’Phiarlan) to indicate their marked status. This convention would later be adopted by all of the dragonmarked houses of Khorvaire after the War of the Mark.
Historians and astronomers claim to have sighted a strange body in the skies of Eberron, rising in the east as the sun sets. Philosophers argue that this unknown body may be the return of Crya, the thirteenth moon, a ghost of what it once was, heralding the lineage of Death. This body was sighted frequently for the next 600 years, although it seemed to have an irregular and unpredictable orbit. After six centuries of haunting the eastern horizon it simply vanished

-1600 Y.K.
The Mark of Death had first appeared among the elven families of the line of Vol, a group of elves involved in secret necromantic studies, which took to calling itself House Vol after the appearance of the mark. The Mark of Death provided its heirs with control over necromantic magic, from the lesser ability to keep dead bodies from decomposing all the way up to the ability to control and create undead. Since undead creatures were viewed as utter abominations by the Aereni elves because of their faith in the Undying Court, the elves of House Vol were viewed with suspicion at best and downright hostility by the other Aereni.