Ultimately, it was Azkaellon, sole survivor of the Sanguinary Guard, who drove the Blood Angels' destiny onwards. In addition, the Flaw slowly made its presence felt, further muddying the Legion's future. Following the death of Sanguinius, there was no clear line of succession, and soon factions within the Blood Angels formed around potential candidates. He knew that he could not jeopardise the sacred duty entrusted to him. Though he yearned to fight at his Primarch's side one final time, with a heavy heart Azkaellon acceded to Sanguinius' wishes. Once reconstituted by Azkaellon, they would go on to serve as a beacon of hope for the Blood Angels and the wider Imperium in the dark days ahead.
Sanguinius' prescient vision of his own fate led him to insist that his Herald remain on Terra so that should he fall, the Sanguinary Guard would not be extinguished. He would be the lone member of the Sanguinary Guard that survived that final confrontation. He continued to serve with his Primarch until Sanguinius perished in the assault on the Warmaster Horus' Battle Barge Vengeful Spirit during the final hours of the Battle of Terra. The venerated hero and founder of the Blood Angels' Sanguinary Guard, Azkaellon served as the Herald of Sanguinius during the Great Crusade and Horus Heresy eras.