Board Thread:Warhammer 40k General Discussion/@comment-67.197.44.118-20130216115719/@comment-7186329-20130424173911

Alpharius and Omegron are primarch twins, that supposedly share a single presence in the Warp. As to the question of their minds being connected is still debatable and unknown. Roboute Gulliman decapitated one of them, which would leave only one to direct the Alpha legion. And yes Roboute did kill one, because if the fight was too easy he would have noticed, and he does know how the twins look like to confirm it, and bring DNA samples.