This archive tracks four layers. A record present in 1 of them (M41) is silent in the rest, and says so.
The Horus HeresyM30–M31
[RECORD LOST]
No record for this location in The Horus Heresy.
Position in this era: [RECORD LOST].
Age of the ImperiumM32–M40
[RECORD LOST]
No record for this location in Age of the Imperium.
Position in this era: [RECORD LOST].
The 41st Millenniumpre-Rift
imperium
Blackwing-class frigate of the Space Wolves
A Space Wolves frigate with a Caestus Assault Ram among its assets, its kaerl rivenmaster Torek Bjargborn, that carries Járnhamar Pack from Fenris to the shrine world of Ras Shakeh and meets a Death Guard destroyer in orbit there (Blood of Asaheim).
Position: Ras Shakeh System (Ras Shakeh) This book's void-battle only (Chapters 6-8, over Ras Shakeh). Location-specific hull placement is editorial. Cited in Blood of Asaheim
Era Indomituspost-Rift
[RECORD LOST]
No record for this location in Era Indomitus.
Position in this era: [RECORD LOST].
Position
A mobile record: it carries a position timeline rather than a fixed point. The archive places it in 1 of the four eras (M41); each era section above carries that era's entry.
Books set here
1 title in the reading tracker touches this record. Titles link out to the tracker.
Every fact in this record, and where it came from. Editorial derivations say so.
identityhigh
wh40k.lexicanum.com/wiki/Undrider (read 2026-10-12 with fetch-page.mjs, citing Blood of Asaheim (Novel), Chapters Five to Eight): 'The Undrider was a Blackwing Class Frigate in service with the Space Wolves Chapter … used to transport Járnhamar Pack from Fenris to the Shrine World of Ras Shakeh … its kaerl rivenmaster was Torek Bjargborn … it possessed a Caestus Assault Ram'. A void ship. NAME-COLLISION CHECK: no index record uses the id or label.
book-joinhigh
VISITED for Blood of Asaheim: the voyage and void-battle aboard it (Chapters 5-8; Lexicanum Undrider and Járnhamar_Pack).
positionsmedium
m41, anchored to ras-shakeh only for space-wolves::blood-of-asaheim::1: the duel with the Death Guard destroyer over Ras Shakeh (Lexicanum Undrider, Chapter Six). No permanent berth or fleet-wide position inferred.
archetypemedium
Named a Blackwing-class frigate (Lexicanum); frigate is the supported renderer family (drawn as an escort), a generic schematic silhouette rather than the exact hull.
gposlow
inferred: book-specific position anchored to ras-shakeh (itself an unsurveyed-rim point). Anchor marker and within-system hull offset are editorial, not physical coordinates or a permanent berth.
erashigh
m41 only, with the novel. Allegiance 'imperium' (Space Wolves).