The Armour of Indomitus

When Roboute Guilliman was roused from ten thousand years of stasis upon his golden throne, the artisans of Mars and the smiths of the Adeptus Custodes laboured together to armour the last living son of the Emperor. The result was The Armour of Indomitus, a suit of auramite plate that shrugged aside las-fire and daemon-claw alike, its surfaces graven with the aquila and the ancient marks of Ultramar.

Forged in the shadow of the Imperium's darkest hour, the war-plate was gifted to the Primarch as he prepared to lead the Indomitus Crusade back into the fractured galaxy. Its systems interwove the finest craft of the Adeptus Mechanicus with the peerless artifice of the Adeptus Custodes, so that no single forge could ever hope to replicate it.

Beneath its gleaming ceramite and gold, the armour bore protective wards against the warp's corruption, a necessity for a lord who now walked a galaxy half-drowned in Chaos. To the warriors of the Space Marines who followed him, the sight of that shining plate upon the field was a beacon in the long night, proof that a Primarch still strode among mortal men to hold back the tide of oblivion.