Prince of Crows is a novella by Aaron Dembski-Bowden in the Horus Heresy Series. It was first published in Shadows of Treachery (Anthology) on September 25, 2012, and re-published online in May 2014.
The Thramas Crusade draws to its inevitable conclusion, with the forces of the Dark Angels and the Night Lords locked in a struggle which neither side can abandon. The Night Haunter lies comatose after being mauled by his primarch brother Lion El'Jonson, and in his absence it falls to Sevatar and the remaining members of the Kyroptera to command the Legion. But the self-styled "Prince of Crows" has his own plans to save the Night Lords from annihilation – plans he intends to follow, with or without his comrades in tow.