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Roboute Guilliman, Primarch of the Ultramarines was condemned exist to lying in a stasis chamber after being mortally wounded by his former brother Fulgrim. Rumors say his wounds have been slowly healing, however once the 13th black crusade reached the world of Macragge, where he was interned, he was brought back to the Imperium. He fought back the dark crusade, and lead multiple crusades of his own, and now has supreme command over the imperium.