Home › Units › Officio Assassinorum › Callidus Assassin
1 / 4 · Click to enlargeLore & origins
The Callidus Temple trains assassins in deception and infiltration. Its assassins use polymorphine, a drug that lets them reshape their bodies and take on the appearance of another person. A Callidus can pose as a servant, a soldier or a noble for months, getting close to the target before striking.
The Temple's assassins are almost all women, and they are trained in disguise, acting and psychological manipulation as well as combat. They aim to kill their target and also to sow chaos and fear in the enemy's ranks. In the Horus Heresy novel Nemesis, the Callidus Koyne is part of an execution force sent after Horus.
Callidus assassins have been used throughout the Imperium's history. One of the most famous incidents was the assassination of Konrad Curze, the Night Haunter, who foresaw his own death at the hands of a Callidus named M'Shen and allowed it to happen.
The Callidus Temple specialises in infiltration and deception. Its assassins use polymorphine, a drug that lets them reshape their bodies to impersonate other people, including other species. Siress Callidus founded the temple and was one of the founders of the Assassinorum. Callidus assassins act as spies, saboteurs and killers, sowing confusion and killing leaders.
Appearance & wargear
A Callidus wears a skin-tight synskin bodysuit and often a mask. She carries a C'tan phase sword, which can slice through almost anything, and a neural shredder, a pistol that destroys the target's nervous system. In disguise she can look like anyone.
In their true form, Callidus assassins wear synskin and carry neural shredders, phase swords and poison blades. In disguise, they can be almost anyone.
Weapons & Vehicles
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Explore all 48 entries in the Weapons & Vehicles armoury.
Battlefield role & tactics
Callidus assassins infiltrate enemy forces and strike at leaders and command structures. In battle they appear in the enemy's midst and cause havoc before vanishing. Their neural shredders kill without harming armour.
The Callidus is a deep infiltrator. It takes on a disguise and kills its target when the moment comes, causing chaos in enemy command structures.
Field Modifications, Sub-Faction Doctrines & Operational Idiosyncrasies
Within the strategic threat-indices of the Departmento Munitorum, the Ordo Xenos, and the high command savants of Officio Assassinorum, Callidus Assassin are classified as a premier character types asset whose battlefield effectiveness stems from the tight integration of operator conditioning and specialized wargear. Conditioned inside the classified Temples of Terra with hyper-metabolic combat chems, polymorphic cellular implants, and pariah-gene animus matrices, Temple clade operatives deploy as lone surgical instruments to decapitate entire rebellions. In active campaign theatres, A Callidus wears a skin-tight synskin bodysuit and often a mask. She carries a C'tan phase sword, which can slice through almost anything, and a neural shredder, a pistol that destroys the target's nervous system.
Veteran formations of Callidus Assassin develop distinct sub-faction doctrines and field modifications over decades of continuous deployment. Night Haunter foresaw his own murder by the Callidus M'Shen and allowed it to happen. He saw it as proof of his own philosophy. Whether fighting in void-ship boarding actions, ash-waste tank duels, or ruined hive-city basilicas, experienced crews and squad leaders strip away parade-ground redundancies to maximize ammunition feed reliability, target-acquisition speed, and close-quarters survivability under extreme suppression.
Field maintenance and biological or machine-spirit recovery logs confirm that sustained combat exacts a heavy toll on both wargear and flesh, yet Callidus Assassin maintain operational cohesion long after standard line units would collapse. Following every major engagement, recovery teams prioritize the immediate extraction of their core panoply, veterancy honors, and consecrated components so that the lineage and lethal institutional memory of the formation endure into the next warzone.
Heraldry, Battle-Damage & Community Artistry
Across the Warhammer 40,000 illustration, Golden Demon painting, and display-diorama community, Callidus Assassin stand out as one of the most rewarding subjects in the Officio Assassinorum range. Artists and miniature painters focus intently on their signature visual hallmarks: matte light-drinking synskin bodysuits, subtle specular midnight-blue highlights along sculpted musculature, glowing green multi-spectral visor optics, and dynamic diorama bases of shattered imperial masonry. Combined with the distinct silhouette described in field sightings—A Callidus wears a skin-tight synskin bodysuit and often a mask—every model and canvas painting offers a rich interplay of texture between rigid armour plates, weathered cloth or chitin, and gleaming weapon assemblies.
When depicting Callidus Assassin at the height of battle, community artists and painters push contrast through sponge-chipped battle damage, directional mud and ash pigments across the lower greaves or hull tracks, and vivid Object Source Lighting (OSL) cast by active lenses, energy coils, or muzzle flashes. Sub-faction heraldry, campaign badges, and trophy details allow hobbyists to anchor each miniature or illustration in a specific canonical warzone—celebrating both the grimdark complexity of the Forty-First Millennium and the craftsmanship of the community that brings Officio Assassinorum to life.
Notable battles & users
- M'Shen: the Callidus who killed the Night Haunter, Primarch of the Night Lords.
- Koyne: Callidus assassin in Nemesis, part of the team hunting Horus.
- M'Shen: killed Konrad Curze, the Night Haunter, on Tsagualsa. Curze foresaw his death and allowed it to happen.
- Koyne: a Callidus in the Horus Heresy-era Execution Force sent to kill Horus, featured in 'Nemesis'.
- Militzia Scarvelli: disguised as a Gretchin, she killed the Ork warlord Oilguzla during an attack on Hive Imperator.
Related
Characters (3)
The Emperor of Mankind · Master of Mankind, Lord of the Imperium
Malcador the Sigillite · Regent of Terra, First Lord of the Council
Konrad Curze · Primarch of the Night Lords, the Night Haunter
