Corax

It is the 31st millennium. Under the benevolent leadership of the Immortal Emperor, the Imperium of Man hasstretched out across the galaxy. It is a golden age of discovery and conquest. But now, on the eve of victory, the Emperor leaves the front lines, entrusting the great crusade to his favourite son, Horus. Promoted to Warmaster, can the idealistic Horus carry out the Emperor's grand plan, or will this promotion sow the seeds of heresy amongst his brothers?

The scattered worlds of the Elara's Veil nebula were once protected by the oath of unity sworn by three mighty Chapters of the Adeptus Astartes. The Star Scorpions were undone by flaws in their genetic coding. The Celestial Lions were ravaged by the Inquisition for sins they did not commit. Now, after hundreds of years, only the Emperor's Spears still keep their vigil. They are barbarian watchmen against the Outer Dark, bloodied but unbroken in their long duty.   

Intent on rebuilding Ultramar, the returned primarch Roboute Guilliman wages war on the treacherous Death Guard - but as he battles his corrupted brother, the intervention of a greater power threatens all he works for. In the void and upon the worlds of Greater Ultramar, the battle for the Imperium continues. Intent on rebuilding his home realm and using it as base to reconstruct the ravaged stellar empire of mankind, the returned primarch Roboute Guilliman proceeds with his war to drive Mortarion and his Death Guard Traitor Legion from the domain of the Ultramarines. 

Fell times have come to the galaxy. Cadia has fallen, destroyed by the onslaught of Chaos. A Great Rift in the warp has opened, and from its depths spew daemons and the horrors of Old Night. But all hope is not lost.... A hero, long absent, has returned, and with him comes the wrath of the Ultramarines reborn. Roboute Guilliman has arisen to lead the Imperium out of darkness on a crusade the likes of which has not been seen since the fabled days of the Emperor.

As the Emperor travels the galaxy at the head of his Great Crusade, few events are as important as rediscovering his scattered sons, the Primarchs, and bestowing them as the masters of their Legions. United, a Legion becomes a reflection of its Primarch, both in his strengths and his flaws. For the Twelfth Legion, once the War Hounds and now the World Eaters, the line between strength and flaw is almost impossible to separate.