Valefor was a Captain in the Blood Angels Chapter when the Ork forces of The Beast invaded the Imperium. He commanded the Strike Cruiser Sanguinem Ignis, when he was sent to Terra by his Chapter, after the Blood Angels received word that their aid was requested[1b] for a strikeforce to attack the planet Ullanor, which had been discovered to be the origin point of The Beast's invasion force.[1a]
He later appeared before Lord Commander Koorland as part of his Chapter's taskforce on Terra.[1c] He was badly wounded by The Beast himself during the Imperial invasion of Ullanor and was evacuated by his own men.