Home › Units › Officio Assassinorum › Callidus Assassin
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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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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.
Munitorum & Ordo Xenos Technical Dossier
Classified under Ordo and Departmento Munitorum threat-index protocols as a primary 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. asset of Officio Assassinorum, Callidus Assassin relies on a tightly coupled symbiosis between operator conditioning and primary armament. Field maintenance and biological recovery logs indicate that extended deployment without liturgical recalibration or bio-stasis rest degrades targeting and metabolic stability by less than 4% per solar week—far outperforming standard sector baselines—while post-engagement recovery teams prioritize the immediate extraction of their core wargear, neural/gene-seed components, or machine-spirit memory cores before enemy scavengers can exploit them.
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
