Cataphractii Terminator armour was among the earliest and most revered patterns of Tactical Dreadnought plate, worn by the elite of the Legions during the Great Crusade and the Age of Darkness. Massive and heavily wrought, it granted its bearer near-invulnerability, encasing a legionary in layered ceramite and integral energy fields that could turn aside blows no lesser armour might survive.
That protection came at a price. The suit's bulk and its power-hungry defences made the wearer ponderous, ill-suited to swift manoeuvre and better fitted to grinding assaults and the choking confines of boarding actions. A warrior in Cataphractii plate advanced like a walking bastion, absorbing fire that would have felled a squad, trading speed for the certainty of endurance.
Because so few suits existed, they were reserved for veterans and honour guards — men such as the Justaerin of the Sons of Horus, whose black-armoured Terminators became a byword for lethality. Forged in the great Mechanicum foundries, Cataphractii armour was a relic of a wealthier age, and each surviving suit would be treasured for millennia after the knowledge to build more had been all but lost.