User blog comment:Legionaire22/Coolest Primarch/@comment-10514705-20110718231645

Magnus. As he initially accepted his fate and took it like a man (even though many of his subjects disagreed with this decision), as he was unwilling to play his part as a pawn of Chaos (notably, a part which the rabid Space Wolves played almost to perfection, aiding the ploy to destroy the two Legions). That, and Magnus' mortal body was crippled, so he was gifted a shiny new Daemon one by the Architect of Fate.

Either that or Night Haunter, who was just so damn cool. Like Magnus, he was willing to allow his predicted fate to occur, purely to prove a point about what the Imperium had become.