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.
Age of the ImperiumM32–M40
[RECORD LOST]
No record for this location in Age of the Imperium.
The 41st Millenniumpre-Rift
contested
Imperial agri world; a daemonic incursion purged by the Grey Knights Purifiers
An agri world of the Sandava System, seat of a Cardinal and a Planetary Governor, where a daemonic incursion threatens to consume the planet and Castellan Merrat Gavallan brings the Grey Knights Purifiers, the young Garran Crowe among them, to purge it. Warden of the Blade is set here, the campaign in which Crowe's burden as Warden of the Blade of Antwyr begins.
Era Indomituspost-Rift
[RECORD LOST]
No record for this location in Era Indomitus.
Position
Map frame: 110.4, 287.6 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 444 units ≈ 47.2k light years, north-west of the galactic core.
Height above the disk plane: -8.0 units — invented thin-disk jitter, deterministic per record. No published source gives any location a z coordinate.
Every fact in this record, and where it came from. Editorial derivations say so.
identityhigh
wh40k.lexicanum.com/wiki/Sandava_System (read directly in a browser on 2026-10-03): 'a star system of Imperial space that has suffered at least two Daemonic incursions' (Warden of the Blade, Prologue, ch. 5), 'located in the same subsector as the Dierna System' (ch. 1); Known Planets: Sandava II 'Formerly an Agri World' and Sandava III 'Hive World' (Prologue); 'At the end of M41, the system was one of many across the galaxy to be engulfed by the Warp Storm known as the Great Rift' (Castellan, ch. 1); the page is filed under 'Segmentum Unknown'. The incursion and the Purifiers' campaign: https://wh40k.lexicanum.com/wiki/Garran_Crowe (Warden of the Blade chs. 2, 7, 10, 13-14, Epilogue), https://wh40k.lexicanum.com/wiki/Merrat_Gavallan (chs. 1, 8), https://wh40k.lexicanum.com/wiki/Daemon ('The Slaanesh incursion on Sandava II', chs. 5-14), https://wh40k.lexicanum.com/wiki/List_of_Cardinals (Beatus Rannoch, Cardinal of Sandava II, ch. 6), all read directly in a browser on 2026-10-03. The Lexicanum page Sandava_II itself does not exist (checked 2026-10-03). NAME-COLLISION CHECK: no index record uses the id or label.
book-joinhigh
PRIMARY for Warden of the Blade (grey-knights::gk-crowe::1): Black Library's description (via Lexicanum Warden_of_the_Blade_(Novel)) says Crowe's task 'first began at Sandava II', and Lexicanum Daemon cites chapters 5-14 for the incursion there.
segmentumhigh
null: Lexicanum files the Sandava System under 'Segmentum Unknown'. Its editorial note that a system the Great Rift engulfed 'is either in Segmentum Obscurus or the Ultima Segmentum' is a deduction, not a published location, and is not used.
classmedium
'agri', for the only description of the world's surface any permitted source gives: 'Formerly an Agri World' (Lexicanum Sandava_System, ch. 1). Nothing describes ice, desert, jungle or hive cities; it is the seat of a Cardinal's cathedral and a Planetary Governor (Lexicanum Garran_Crowe), which fits a farmed world.
gposlow
inferred: no permitted source names a segmentum, sector or neighbour with a position for the Sandava System (only that Dierna shares its subsector), so the record claims no segmentum and sits on the unsurveyed rim at the generator's rim_xy('sandava-ii') = [110.4, 287.6] (ported function, checked against manzipor = [943.3, 550.2] and sarthis-majoris = [846.3, 759.0]; build_locations.py itself was not run). Sandava III shares the system's x, y. The position carries no information and must not be read as one. Z -8 is the zPolicy value (compute-z.mjs sandava-ii 110.4 287.6).
erasmedium
m41 only, the novel's era (M41, before the Great Rift; Lexicanum Garran_Crowe 'In M41 as a young Purifier'). Allegiance 'contested': an Imperial world under daemonic incursion. The world's fate at the end of the novel is deliberately not written into the era status or summary: it is the book's ending and lives in the catalogue SPOILERS field (Lexicanum Exterminatus and Sandava_System carry it).
systemIdhigh
'sandava': Lexicanum Sandava_System. systems/sandava.json is a two-body TRUNCATED survey, authored because this is Warden of the Blade's PRIMARY setting.