That might have been believable were this not a Seer who had previously been a Dire Avenger. It's possible that this could be justifiable for one reason or another, but it's something which just seems a little odd when the craftworld has repeatedly fought humanity and Imperial forces in recent months.
I guess its going to have to fall under the aegis of "artistic licence" then, where for the sake of a good story the occasional piece of "lore" gets quietly ignored,
Aurelian Mephiston, Lord of Death Visions of Heresy Death of Antagonis the Night Lords Trilogy the books with Argel Tal/ the Word Bearers as their focus (Horus Heresy) Scorched Earth Vulkan Lives, Unremembered Empire (don't make me pick one ;-; I have shelves and shelves full of 40k books and these are the ones out of the many) the saddest one was Dead Men Walking though :x
Just finished Death of Antagonis and let me just say, without spoilers. You know how most Space Marine battle novels have fantastic art of an epic battle on their cover? And how that battle is the climax of the book? Well, in Death of Antagonis, that battle starts *in the first three pages*
