Balsar Kurthuri was a Librarian in the Raven Guard Legion during the Great Crusade, until the Edict of Nikaea; when he was then forced to become a Legionary. He would later take part in the Horus Heresy and was one of the few of his Legion to survive the Dropsite Massacre. Afterwards, Balsar was chosen to become his depleted Legion's Chief Librarian when his Primarch Corax reinstated the Raven Guard's Librarius.[1a]
In the later years of the Horus Heresy, Balsar's standing within the Legion would change once more; after a meeting with his fellow Librarian Fara Tek. Fara had just rendezvoused with his Legion, where it was gathering in the Rosario System, and shared with Balsar a psychic message he had received before he had rejoined them. Though the message was not clear, Balsar gathered from it that the Primarch Leman Russ' life was in danger, but little else. He could not tell Balsar where the message had come from, though he had been able to receive another message from a nearby Space Wolves Strike Cruiser; that was being attacked by the Word Bearers and needed aid. Balsar immediately brought this information to Corax, who dispatched Captain Agapito Nev, and the Battle Barge Providence, to save the Space Wolves Strike Cruiser. Agapito succeeded in doing so and brought the Strike Cruiser's commander, Rathvin, to meet with Corax. The Space Wolf proceeded to inform the Raven Guard's Primarch, that Leman Russ was indeed in danger, as his Legion had been cornered on the world Yarant Three by Horus' forces, which heavily outnumbered them.[1a]
Rathvin would leave shortly afterwards, to join his his Legion in battle, and Corax quickly gathered his commanders and informed them the Raven Guard were going to Yarant Three to aid the Space Wolves. Balsar was shocked however, when his Primarch informed him that he would not be joining them and that he had also been stripped of his title of Chief Librarian; as Corax had once again disbanded the Raven Guard's Librarius. For reasons unknown to Balsar, Corax had grown deeply mistrustful of psykers and wanted his former Librarians to be immediately separated from his Legion and sent away to Terra. Though Balsar was eventually able to convince his Primarch, to let his fellow psychic brethren remain with the Legion, as long as they did not use their powers, the former Chief Librarian's fate was sealed. Corax commanded him to depart for Terra at once and told Balsar that when he arrived there, he was to present himself to Malcador the Sigillite, who would decide what would become of him.[1b]
When Kurthuri arrived in the Sol System, accompanied by Captain Noriz and his Imperial Fists and Arcatus and his Custodians, the Custodian Ludivicus gave the order to hunt the Librarian down. Arcatus immediately obeyed, attacking Kurthuri on the bridge, but Noriz attempted to help him escape the ship. Cornered by Arcatus, Noriz was killed by the Custodian, but Kurthuri was spared when he backed down from using his psychic powers to avenge the captain's death. Kurthuri was brought before Malcador the Sigillite and presented with a suit of grey power armour by Umojen, becoming one of the Knights-Errant.
- 1: Weregeld (Novella), Corax (Anthology)
- 2: The Grey Raven (Short Story)