For uncountable ages the Blackstone Fortress has kept its watchful silence. It patiently waits, willing those brave enough to gamble everything exploring its halls. Only the most determined of adventurers will return with riches – the unworthy are never seen again. But to many, the rewards far outweigh the risks. Among the denizens of Precipice, ratlings, robots, and rogue traders all pursue their own agendas, pitting themselves against the myriad forces of darkness that have claimed the fortress as their own. Deadliest of all is Obsidius Mallex, who aims to twist another Talisman of Vaul to Chaos’ unholy cause. Unless this traitor is stopped, the galaxy will burn beneath the wrath of the Ruinous Gods.