Who Is Katakros? — Mortarch of the Necropolis

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Katakros is the greatest military strategist in the service of Nagash and the supreme general of the Ossiarch Bonereapers, an undead army unlike any other in Warhammer. Known as the Mortarch of the Necropolis, he was a renowned conqueror in life, and Nagash remade him in bone as the perfect undead commander. Katakros combines the strategic genius of his mortal life with the patience and tirelessness of undeath, which makes him one of the most dangerous military minds in the Mortal Realms: a general who never sleeps, never forgets and never stops planning.

What sets Katakros apart from other undead leaders is that he is not a monster, a sorcerer or a berserker. He is a general. His power lies less in personal combat prowess (though he is formidable) than in his ability to organise, coordinate and deploy armies with near-perfect precision. In a setting full of gods who smash things and champions who charge into battle, Katakros is the cold professional who wins wars through planning and relentless discipline.

Who Was Katakros in Life?

In life, Katakros was a mortal warlord and conqueror of extraordinary talent, remembered for campaigns of meticulous planning and ruthless efficiency. Published lore focuses on his reputation as a general rather than a detailed biography, and much about his mortal life is left deliberately vague.

After his death, his soul came into the possession of Nagash, the Great Necromancer. Nagash saw in Katakros something more valuable than another warrior: a mind that could build and command armies with a precision his other servants lacked. Rather than raise him as a mindless servant, Nagash rebuilt him as the Mortarch of the Necropolis, a role that let Katakros keep his strategic faculties while binding him to Nagash’s will.

What Are the Ossiarch Bonereapers?

The Ossiarch Bonereapers are the legions Katakros commands. Unlike the hordes of the Soulblight Gravelords or the spectral hosts of the Nighthaunt, the Bonereapers are a disciplined, professional military force. Each warrior is a purpose-built construct, made from harvested bone and animated by souls that have been refined and bound together to give it specific battlefield roles.

Bonereaper warriors such as Mortek Guard, Kavalos Deathriders and Necropolis Stalkers are not individuals in the usual sense. Each is a composite being, built from bone and bound souls by the Mortisan priesthood, so it fights with mechanical precision and unwavering resolve.

This manufacturing process is what drives the Bone-tithe: the bones that the Bonereapers demand from the living nations of the realms. Mortisan envoys negotiate the tithe, and when a settlement refuses or falls short, the legions come to take what is owed by force. Where other undead armies grow by raising the dead, the Bonereapers grow through collection and construction, and that suits a commander like Katakros perfectly.

How Does Katakros Command His Forces?

The Bonereapers are organised like a mortal army perfected by undeath. Katakros sits at the top. Below him come commanders such as the Liege-Kavalos, mounted generals who lead the legions in battle, and the Mortisan priesthood, including the Boneshapers who build and repair the army’s constructs. At the base are the rank-and-file Mortek Guard.

Bonereaper constructs are bound to Nagash’s will and to the commanders set over them. They feel no fear, do not tire and follow orders without hesitation. That gives Katakros an army with none of the morale problems, exhaustion or desertion that hamper mortal generals, and it lets him plan campaigns with a precision no living commander could rely on.

What Are Katakros’s Notable Achievements?

Katakros’s defining role in the Age of Sigmar story is leading the Ossiarch legions as they expanded out from Shyish, the Realm of Death, to collect Nagash’s due from the other realms. His method is not a wild charge or a dramatic siege but a grinding, methodical advance that takes territory piece by piece.

That campaign puts him in direct opposition to the forces of Order, including Sigmar’s Stormcast Eternals. Nagash and Sigmar were once allies before becoming bitter enemies, and Katakros’s legions are one of the main instruments of Nagash’s ambitions in the realms beyond Shyish.

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What Is Katakros Like on the Tabletop?

On the tabletop, Katakros is a commanding centrepiece hero rather than a pure combat monster. His abilities focus on making nearby Ossiarch units fight better, and he is at his best directing the battle from behind a solid front line rather than charging in alone. Abilities and points change with battletomes and Battle Profiles, so check his current warscroll for the details.

His model is one of the most striking in the Age of Sigmar range: a large, diorama-style centrepiece in which Katakros is accompanied by attendant constructs, including standard bearers. It works as both a gaming piece and a display piece.

Playing Katakros well requires an understanding of the Ossiarch Bonereapers’ playstyle: methodical, durable and focused on grinding the enemy down. He rewards players who think ahead and position their forces carefully. He is not a beginner’s choice, but for experienced players who enjoy tactical depth he is very rewarding.

Frequently Asked Questions

Is Katakros stronger than Nagash?

No. Nagash is a god, and his power dwarfs Katakros’s entirely. Katakros serves Nagash and cannot disobey him. In pure military strategy, though, Katakros is arguably the better general: Nagash’s arrogance is a weakness Katakros does not share. Nagash provides the power; Katakros provides the strategy.

Does Katakros have free will?

That’s open to interpretation. Katakros was rebuilt by Nagash with his strategic faculties intact, but his loyalty to Nagash appears absolute. Whether that loyalty is something Katakros would choose or something Nagash built into him is left unclear, and the ambiguity is part of what makes him interesting.

What is the best Ossiarch army list with Katakros?

Katakros works best in armies that put plenty of units within reach of his abilities. A solid core of Mortek Guard, supported by Kavalos Deathriders and artillery such as the Mortek Crawler, makes a balanced force around him. Keep him where he can support as many units as possible while staying protected. Check the current Battle Profiles for points before you build a list.

Is Katakros related to the Mortarchs in Soulblight Gravelords?

Yes, in the sense that “Mortarch” is a title Nagash grants to his most powerful servants. Katakros is the Mortarch of the Necropolis (Bonereapers), while Mannfred and Neferata are Mortarchs within the Soulblight Gravelords. All Mortarchs serve Nagash, but they operate independently and occasionally have competing interests.

What is the difference between Katakros and Arkhan the Black?

Both serve Nagash with the Ossiarch Bonereapers, but in different roles. Katakros, Mortarch of the Necropolis, is the military commander who plans and leads the legions in war. Arkhan the Black, Mortarch of Sacrament, is Nagash’s sorcerer and chief servant, overseeing the Bonereapers’ creation and their deeper purpose. Katakros is the general; Arkhan is the high priest.

Who is Vokmortian?

Vokmortian is the Ossiarch Bonereapers’ Master of the Bone-tithe, a Mortisan who oversees the collection of bones owed to Nagash. He negotiates tithes with mortal settlements, and when a tithe is refused or comes up short, the Bonereaper legions under commanders like Katakros arrive to take what is owed by force.