Board Thread:Warhammer 40k General Discussion/@comment-69.143.134.163-20150419161351/@comment-120.188.6.217-20170723033646

My theory is 1 one of them discover chaos(or other star gods)that have the powers of the warp and the traitor is like magnus a great psyker(diffrent type from magnus) and went rogue then fought the other legion then all of them dies horribly (that can also explain russ' words) 2 they were killed by chaos forces and some of their men betray them and worship chaos (this also can explain why empy kept chaos secret) and fought half of their men who went traitor alongside each other (also explain russ' words) 3 one of them have flaws like blood angels' black rage but didn't need their primarch's death to activate and got killed by the other one