Lorgar

Most devoted of all the primarchs, it was Lorgar who first fell to the lure of Chaos. Once known as Aurelian, this golden son of the Emperor of Mankind found himself an outcast because he worshipped his father as a god. Humbled before the ruins of Monarchia, chastened and brought low, Lorgar yearned for deeper meaning. He found it in the power of Ruin and thus began the descent into heresy. His fate had not always been so. On Colchis, his adopted birth world, Lorgar was not always the zealot, though his path would be nurtured by one: the priest Kor Phaeron.