Calth That Was is a novella published in The Horus Heresy series that was originally part of an anthology. Calth That Was 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 Calth That Was has yet to be published separately.


Captain Remus Ventanus has a fateful encounter that will alter his destiny and shape the face of the Ultramarines Chapter for ten thousand years to come.


  • Calth That Was (Novella) by Graham McNeill
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