James Swallow
Bloodline

Blood Angel Sergeant Rafen is on the verge of death, torn apart by a raging torrent within him - the raw power of the blood of Sanguinius.
Warhammer 40k
short

Also in:
Hammer And Bolter: Year Two
Blood Angels: the Complete Rafen Omnibus
Sons of Sanguinius: the Blood Angels Digital Collection
25 For 25
Blood Angels: Quick Reads Collection