Knights-Errant - Caliban (007.M31): Garviel Loken was sent by Malcador on his first mission to the Dark Angels' homeworld of Caliban, alongside his former comrade in the Luna Wolves Legion, Iacton Qruze.Their vital mission called for the Knights-Errant to ascertain both the Ist Legion's strengths and loyalty to their Primarch Lion El'Jonson. Infiltrating the Dark Angels' fortress-monastery of Aldurukh, Loken allowed himself to be captured by the Dark Angels.Shackled and bound, he soon found himself being interrogated by Caliban's regent, Luther. Identifying himself only as "Cerberus," Luther was still able to accurately determine his captive's status as a former Luna Wolf based solely on his Cthonian accent.Loken's captor mentioned his prior experience fighting alongside the Luna Wolves at both Cardensine and Zaramund, which triggered Loken to experience flashbacks of those moments.Upon further study by torchlight, Luther recognised Loken, but only vaguely, as he was still unsure of his captive's identity. Luther questioned Loken as to why one Legion would be spying on another, which showed Loken that the regent of Caliban was still woefully ignorant of the broader events of the Horus Heresy that currently raged throughout the galaxy.Though he wished to tell Luther the full truth, he felt that Caliban was surrounded by darkness and would eventually turn to the service of the Traitors. Unsatisfied, Luther took his leave from Loken's cell.The Knight-Errant was then confronted by a small hooded figure in his cell -- a Watcher in the Dark. Through telepathy, the Watcher gave Loken a small fraction of its abilities to sense Luther's feelings.The creature would not offer an explanation as to its presence, and instead freed him from his bondage. He wanted Loken to explain to both Rogal Dorn and the Sigillite what he had witnessed -- that Luther was ignorant of the wider events of the Heresy, and that he was ambitious and felt resentment towards the Lion.This only complicated Loken's mission, as Terra had no clue as to the Lion's true loyalties. During his escape, Loken was discovered by a mysterious figure who had snuck up on him and held a Power Blade to his throat. Startling the Knight-Errant, the figure said Loken's name.He explained that he was the Lord Cypher, and proceeded to assist Loken in his escape. When they encountered a lone Dark Angels sentry, Cypher ordered the guard to hold, in order for Loken to subdue him. Unfortunately, this was not enough, and Qruze methodically killed his fellow Astartes in cold blood with his Stalker Pattern Bolter.Enraged over Qruze's callous disregard, Loken chastised the older Knight-Errant for the necessity of such a brutal action, explaining that with this one Dark Angel's death, it might now tip the scales of loyalty for the entire Ist Legion against the Imperium.The veteran warrior dismissed Loken's misgivings, explaining that the sentry was not the first loyal servant of the Imperium he had killed, nor would he be the last.With the help of Cypher, the two Knights-Errant made good their escape from the dungeon of the fortress-monastery. Even though the pair of Knights-Errant had failed in their original mission, they had perhaps found something greater -- a potential recruit in the form of Cypher. The Dark Angel was aware of the wider events unfolding across the galaxy, but explained that events on Caliban were complex.Qruze offered his old comrade the opportunity to become one of Malcador's agents, but ultimately, Cypher refused his generous offer, for he would continue to serve in the shadows -- loyal to the Emperor, but unremembered and unknown.