castus-class armour is perhaps the most heavily-armed and armoured of all Knight suits in the Imperium, rare beyond belief amongst even the greatest Knight Households. Equipped with ranged armaments of incredible magnitude, these mighty engines serve as both battlefield supremacy weapons and icons of the Machine God's divinity – the Knight Asterius is even more scarce than most, a walking siege engine with a machine spirit of all-consuming fire. While its arcane conversion weaponry reduces fortress walls and enemy Titans to dust with escalating beams of antimatter, the radioactive warheads