A Deeper Darkness is a short story published in The Horus Heresy series that was originally part of an anthology. A Deeper Darkness was first published as part of the Mark of Calth main series anthology in April 2013. The cover image used is that of Mark of Calth, as A Deeper Darkness has yet to be published separately.


In his hunt for the Word Bearers Dark Apostle Ungol Shax, Ultramarine Hylas Pelion realises there are things in the Warp that even the Word Bearers should fear.


  • A Deeper Darkness (Short Story) by Rob Sanders
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