Illumian cabals are hidden organizations that pursue their individual agendas in secret. These cabals are grouped into broad categories according to their goals and methods. Those that use undeath as a means of preserving knowledge are known as gravewhisper cabals.
One gravewhisper cabal, known as the Finalveil Cabal, has long held a tome of great power called the Veiled Codex in one of its crypts. The members of this group have been using the lore from this ancient volume to turn the eldest and most powerful members of the cabal into undead creatures, thus ensuring that death cannot rob the organization of talents and wisdom. The illumians of the Finalveil Cabal regard their use of necromantic magic and their association with undead creatures as pragmatic rather than evil -- nothing more than a tool for the preservation of important knowledge. They devote themselves to gathering the necessary materials for these transformations and to ensuring that the organization's existence remains a secret.
Despite their efforts to keep their activities hidden, however, the members of the Finalveil have attracted a number of powerful enemies over the centuries. Several good-aligned churches, having learned about the growing number of undead creatures the cabal is creating, have mounted efforts to destroy them. Furthermore, at least two other cabals of illumians oppose the use of necromancy as a tool, despite the convenience it provides in the preservation of important illumian scholars. Other groups too, whether knowingly or not, have worked to destroy the undead creatures within the Finalveil. Unbeknownst to the members of the cabal, these enemies have gathered important information about the group and the source of its knowledge.