The Ashen Claws helped devastate the Nostramo Sector through raids aimed at ships, weapons and supplies. The Horus Heresy: Book Six – Retribution’s The Scouring of the Nostramo Sector places their attacks alongside xenos incursions and Night Lords infighting in its account of the sector’s collapse.
The dossier follows the destruction through several perspectives: a reconnaissance officer exploring a gutted fortress, a Night Lords commander defending his fleet, an Ultramarines officer describing betrayal and a compiler connecting the surviving evidence.
GW’s September reprint announcement introduces the dossier. The full official extract supplies the accounts below. Page references count the PDF’s cover; dates follow the extract’s chronology.
Header artwork: Space Marines in a boarding action, as used in GW’s Nostramo feature.
A fleet arrives in a ruined sector
In At Empire’s End (PDF page 2), returning Loyalist forces expect entrenched Night Lords resistance. They find isolated warbands, ruined fortresses and wrecked ships. Suspecting a trap, the fleet withdraws its main strength and conducts a survey before moving on.
That survey supplies the investigation’s starting point. The later reports take the reader backwards through the devastation, linking wreckage and abandoned strongholds to the forces that fought there.
Tenebor: salvage after the assault
Shadows of the Past (PDF pages 4–5) gives a Blood Angels reconnaissance report from 017.M31. A patrol enters the remains of Tenebor, the fortress-moon associated with Nostramo, and finds signs of a multi-directional assault and extensive salvage.
Night Lords bodies are missing their progenoid glands. Stores have been stripped of usable material. Pict-captures show attackers in unfamiliar black-and-red heraldry, wearing heavily altered armour that appears to be mostly Mark II and Mark III.
The pattern points to raiders seeking resources as well as destruction. Gene-seed, equipment and supplies all have value to an isolated force sustaining itself through war. The report’s older garrison record and estimates from the remains give the fighting an approximate chronology; the precise capture date remains uncertain.
The Raven Guard connection
The Ashen Claws (PDF page 7) discusses an earlier XIX Legion Chapter of that name and its Terran background. The Raven’s Cast-Offs (PDF page 9) identifies Nerat Kirine and the surviving 18th Chapter veterans after Gate 42, then describes Corax sending unwanted elements into Crusade fleets on the north-eastern fringe.
The account presents a deep hostility between those earlier warriors and the Legion identity favoured by Corax. Its interpretation of his intentions at Gate 42 forms part of the dossier’s reconstruction.
Carrion Birds All; Red Pinioned and Bright-eyed (PDF page 10) dates the fleet’s departure to 002.M31. Its original commander is Praetor Calvus, a Deliverance survivor loyal to Corax. The initial force comprises roughly 4,000 legionaries, thirteen capital vessels and a score of smaller ships.
The compiler considers the attrition that years away from support would bring. Calvus’s later fate remains uncertain, while the fleet’s subsequent raids show how strongly its activities became tied to acquiring supplies.
Kalleth: repulsed raiders, crippled defenders
The recovered communications at Kalleth (PDF page 7) give the Night Lords commander Ophion’s perspective. As the Ashen Claws attack, the Shroud of Eventide shields other vessels. The raiders eventually fall back, leaving the ship so badly damaged that Ophion expects it to crash.
The defence repels the attack at a potentially disastrous cost. Ophion fears what his loss would mean for the fleet’s cohesion. Later investigators find too few bodies for the ship’s full complement and indications of survivors; his ultimate fate remains unresolved.
The episode shows how a successful defence can still leave a fleet in danger. Damage to a flagship threatens the cohesion of the force it protects.
Desperation: Kirine’s independent war
The Ultramarines account on Desperation (PDF pages 8–9) makes the Ashen Claws’ priorities plain. Their fleet attacks Night Lords ships, apparently helping the Imperial force. When contacted, Kirine rejects service to both the Emperor’s realm and the Warmaster. His message also speaks of Corax as dead, expressing his own view of the Primarch’s fate.
The raiders then land near an armoury and attack Ultramarines positions to seize its supplies. They withdraw with munitions after taking losses among their own warriors.
Their war is driven by the fleet’s interests. A Night Lords ship and an Ultramarines armoury can both become targets when each offers something the raiders want.
The dossier’s Orbital Interface Assault Groups section (PDF page 11) develops that pattern: rapid assaults supported by fighters, gunships and assault craft, with weapons and munitions taking precedence over territory.
Several causes of collapse
In Carrion Birds All (PDF page 10), the compiler treats the rogue Raven Guard fleet as a major contributor to the disaster, alongside xenos attacks and fragmentation among the Night Lords. Raiding pressure compounds the sector’s existing instability.
An addendum supplies a final clue. A patrol report dated 063.M31 records an intercepted message apparently less than a year old, mentioning a Second Crusade, bondsmen and a return to Atargatis. The patrol questions the apparent date and considers a warp echo. The intercept leaves a tantalising possibility of survival within the dossier’s uncertain chronology.
Across these accounts, the Ashen Claws emerge as a force sustaining itself through predation. Their battlefield choices repeatedly lead towards the supplies, vessels and weapons that let their independent war continue.
