Endu Epics
The Endu Epics are a series of works were written explicitly in Endu. The period of authorship is during the earliest eras of Necromancy, near the Age of Darkness and definitely within the first few centuries of the first Chaotic Period of the Mage Wars. There are dozens, possibly hundreds of such epics, many of which form the basis for the holy scriptures of the necromancer religion. The term "Endu Epic" refers explicitly to texts written when Endu was the only written or spoken language of necromancers. A curious side-note means the authorship of the Endu Epics must predate the Golden Age of Necromancy. Note that some texts are still written in Endu, but this does not make them part of the Endu Epics.
Officially, necromancers throughout history have insisted that the Endu Epics can only be read in Endu; as such now born necromancer has ever undertaken to translate them. Some Acolytes and various non-necromancers have undertaken translation attempts over the years, often producing complex and very esoteric works. More serious attempts have found the very old forms of Endu nearly impossible to relate to Common, as the language makes heavy use of metaphor and simile, being deeply routed in a now long-lost way of life. Natural-born necromancers, however, contend that the texts are still perfectly legible, and that interpreting them requires being fully rooted in the necromancer world view.
There is a known body of roughly 6,000 texts which collectively make up the Endu Epics. Their exact organization is heavily debated. However, all necromancers agree on exactly which texts from the epics qualify as holy scripture and which ones are merely very old pieces of writing. The sacred scrolls have changed very little since the canon solidified in about 3200 B.G.A., allowing modern Endu scholars to fully restore the deuterocanonical texts.