Warhammer Age of Sigmar Codexery

The Siege of Nagashizzar

The rebellion where a Mortarch dared to challenge the Necromancer's eternal throne.

The Siege of Nagashizzar

The Siege of Nagashizzar stands as one of the most pivotal confrontations in the history of the Mortal Realms, marking a key chapter in the War for the Soul of Nagash. It was a brutal conflict between Nagash's undead legions and the Ossiarch Bonereapers led by the Mortarch Katakros, not a direct assault by Sigmar or the Stormcast Eternals. Located deep within the Realm of Death, this struggle represented a clash of wills within Nagash's own domain, as his forces turned against each other in a bid for control.

Primary Combatants
Ossiarch Bonereapers vs. Nagash's Undead Legions
Key Figures
Katakros and Nagash
Outcome
Nagash's forces repelled the Ossiarch Bonereapers; fortress remained intact

Lore & Background

The battle was not fought solely on stone streets but within the metaphysical realm where souls are harvested. Katakros, once a loyal Mortarch, led the Ossiarch Bonereapers in a rebellion against Nagash, seeking to usurp his master's power. The siege culminated in a fierce confrontation between the two, shaking the foundations of Nagashizzar. However, the fortress stood firm, and Nagash was not defeated; instead, the assault ultimately failed, and the Necromancer King's throne remained unbroken.

In Their Own Story

The air tasted of ash and old blood as Kaelen stepped over the shattered remains of a bone guardian. Lightning from Azyr crackled above the necrotic spires, illuminating the path to the inner sanctum. He could feel the weight of Nagash's gaze pressing against his soul, heavy and cold like a tombstone. 'For Sigmar,' he whispered, raising his hammer as the gates groaned open before him.

Reader's Guide

The conflict began when intelligence revealed Nagash was preparing a ritual to claim dominion over all existence. Sigmar rallied the Stormcast Eternals and allied mortal factions for a daring strike into the Realm of Death. The assault faced relentless resistance from the Undead legions, who defended every inch of their necropolis with fanatical zeal. Breaching the outer walls required immense sacrifice, as magic wards sought to turn the attackers themselves against them. Inside the city, champions fought through waves of Liches and Vampires while Sigmar pushed toward the central throne room. The turning point arrived when Sigmar confronted Nagash directly, using his divine authority to sever the Necromancer's connection to the souls he hoarded. The lasting impact reshaped the balance of power in the Mortal Realms. With Nagash defeated and his fortress compromised, the threat of total undeath was temporarily halted, allowing life to flourish once more across the shattered worlds.

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