Of all the forge worlds that toil in the Omnissiah's name, Ryza is the one whose genius burns brightest. Its Tech-Priests are the unrivalled masters of plasma technology and the magnetic containment fields that cage it, and many within the Cult Mechanicus rank its sophistication as second only to that of Sacred Mars. The pattern-weapons and reactor cores that leave its manufactories are coveted across the Imperium, and famed engines of war such as the Executioner and the Stormblade were first given form in its cradles.
This obsession is as much creed as craft. Since the long night of the Age of Strife the world has been shaped by a Cult Mechanicus sect that held plasma to be the literal lifeblood of the Machine God, teaching that in harnessing that seething power a Tech-Priest touched a fragment of the Omnissiah's essence. From this doctrine rose the Legio Crucius, the Warmongers, a Titan Legion armed to an unusual degree with plasma weaponry drawn from Ryza's vaults. When the galaxy tore itself apart in the Horus Heresy, the strength Ryza had gathered in its rivalry with Mars proved its salvation, and the Defence of Ryza passed into legend.
In the millennia since, the world has become a byword for defiance. Time and again it has been beset by titanic invasions and greenskin sieges that grind on for years without end, its plasma-fires holding at bay foes that would overrun a lesser forge. Ryza is proud, embattled and indispensable, its burnt-orange legions certain that the Imperium cannot do without the fire they alone command.
Adeptus Mechanicus
Order of battle
The Forge World Ryza field the units of the Adeptus Mechanicus — a detachment from the roster:
Kindred formations
Other Adeptus Mechanicus formations
Forge World AgripinaaAgripinaa, the Orb of a Million Scars, is a grim and war-battered forge world set perilously close to the Eye of Terror. For ten thousand years it has laboured to arm the Imperial bastions of the Cadian Gate, its manufactories choking out ammunition, autoguns and battle tanks without pause. Bloodied again and again by the Black Crusades of Abaddon the Despoiler, Agripinaa is a fortress-foundry that forges in one hand and wars with the other, its survival bought in blood and rust.
Forge World GraiaGraia is a forge world renowned for its unbreakable resilience and its fanatical devotion to the war effort of the Imperium. Its Tech-Priests are famed for their stubborn refusal to yield ground, augmenting their forces with redundant systems and unshakeable programming so that even grievous damage cannot halt their advance. Graia's legions fight on where others would break, their machine spirits and cyborg soldiers driven by an almost supernatural will to endure.
Forge World LuciusLucius, called the Hollow Forge, is among the strangest and most secretive of all forge worlds, a planet turned inside out around a captive star. Its Tech-Priests have achieved a command of teleportation matched nowhere else in the Machine Cult, translating warriors and even god-machines through the immaterium and onto the battlefield in the space of a heartbeat. From this cavernous world stride the Titans of the Legio Astorum, and its forge-guilds hoard techno-arcana the wider priesthood can scarcely comprehend.
Forge World MarsMars is the sacred heart of the entire Adeptus Mechanicus, the birthplace of the Cult Mechanicus and the seat of the Fabricator-General who rules over every forge world in the Imperium. Its rust-red surface has been consumed by ten thousand years of industry, buried beneath foundries, hive-manufactories, and the fume-choked spires of the Martian priesthood. From Mars flow the oldest doctrines, the most jealously guarded secrets, and the ultimate authority to which all other forge worlds must ultimately answer.
Forge World MetalicaMetalica is a forge world so utterly given over to industry that scarcely a scrap of natural land remains upon its surface. It is a planet of ceaseless machinery, its skies black with pollution and its ground a single unbroken sprawl of foundries and hab-stacks. The Tech-Priests of Metalica are famed for their vast, disciplined Skitarii legions and their belief in the supremacy of the machine over the frailty of flesh, marching to war in overwhelming, relentless numbers.
Forge World Stygies VIIIStygies VIII is a forge world with a shadowed and controversial reputation, its Tech-Priests long suspected of dabbling in forbidden and xenos-derived technologies in their pursuit of knowledge. Masters of stealth and misdirection, the magi of Stygies favour cloaking systems, ambush tactics, and the study of alien war machines. Whether radical heretics or merely bold researchers pushing the boundaries of orthodoxy, the priesthood of Stygies walks a razor's edge between innovation and damnation.