After his wounding in the Drop Site Massacre Valzen became wretched thing more chrome and haemolubricant fluid than blood and bone. Valzen's augmented appearance was often the subject of mockery for the rest of the Legion.
Following Konrad Curze's wounding in the Thramas Crusade, Valzen tended to his Primarch's wounds. He later joined with Sevatar in the powerstruggle of the Night Lords following Curze's wounding and was among those stranded aboard the Invincible Reason with the First Captain. He was presumably transferred into a prison cell on Macragge following the arrival of the Dark Angels to Ultramar.