- Last Stand on Syban (365.M41) - The Graven Spectres Renegade Chapter assaulted the relic world of Syban, intent on plundering its great stasis museum. The vault filled the core of the hollow world, millions of chambers filled with artefacts and ancient objects gathered by Syban's curator fleets over thousands of years. In their reckless attack, the Spectres unwittingly break the seals on the Daemon Tomb of Knor, awakening the Daemon Prince within from its millennia-long slumber. Soon the renegades were fighting for their lives against Knor and his minions, the Daemon using the eldritch artefacts of the vault to summon more of its kind and break down the walls of reality. Alien statues, arcane constructs and ancient machines are animated by Warp-creatures, tearing their way free of their casements and falling brutally upon the Renegade Space Marines. A single squad of Grey Knights Terminators are the only forces able to reach the beleaguered world, and they fight their way inside over the piled bodies of slain Spectres. Reaching the heart of the vault the Grey Knights find themselves overwhelmed, and with little chance of success against Knor and his ever-growing host. In a final act of sacrifice, the battle-brothers engage the planet's stasis failsafes, freezing it in time forever. The fate of the rest of the surviving renegade Graven Spectres is unknown.
The Graven Spectres' colours are not listed in current Imperial records.
The Graven Spectres' badge is not listed in current Imperial records.
- Codex: Grey Knights (7th Edition), pg. 94