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Propheticum Hereticus Tenebrae
From Warhammer 40k - Lexicanum
The Propheticum Hereticus Tenebrae is an archive of dark lore based on the dreaded Tyrant Star, consisting of many sources, case studies and prognostications; compiled by the Inquisition's Tyrantine Cabal and housed in the depths of the Bastion Serpentis. Its implications trouble the sleep of many great minds.[1]
Source
- 1: Dark Heresy Timeline, pg. 5