Castigation of the Cult of a Thousand Tongues

The Castigation of the Cult of a Thousand Tongues was an Imperial retribution campaign carried out by the savage and unforgiving Blood Vultures Space Marine Chapter against the world of Narcisium. This was the final campaign of a hundred-year long Penitent Crusade - carried out by the Chapter following the lamentable Ruination Heresy that occurred on their homeworld a century earlier.

History
Following the Ruination Heresy, the Inquisition quarantined off the Akeldama System, placing the Blood Vultures under the custody of the Ordo Hereticus to investigate them for potential heresy. After being put through intense physical, moral and spiritual tests, and having their gene-seed thoroughly investigated by representatives of the Magos Bioligis, the Blood Vultures were declared free of corruption. To atone for the loss of innocent lives under their watch, and to give appropriate recompense, the Blood Vultures willingly undertook a one-hundred year Penitent Crusade.

During the final decades of the Crusade, the Chapter was led to the world of Narcisium through the arcane divinations of their Chapter's Librarians. The Chapter proceeded to strike like a thunderbolt when the hive world declared against the Imperium's yoke in favour of their corrupt Planetary Governor, whose charismatic oratory and persuasive powers allowed him to hold entire hives in his thrall. Unbeknownst to the general population, the Imperial commander was corrupted by a secret cabal of Slaanesh worshippers, which had already enticed several high-ranking Imperial nobles into their salacious pleasure cult. The renegades were brutally exterminated, and the heads of the cult leaders, including the Planetary Governor, were displayed upon the ramparts of the governor's palace. The world of Narcisium was brought back under Imperial compliance within the day.