User blog comment:Legionaire22/Who is better?/@comment-1257337-20111016005244

Magnus. Like the golden discussion Malcador was awesome enough to use the golden throne for a few hours. Magnus was going to be able to sit there for a the rest of human existence. Then he turned traitor, bummer. Note that (With assistance) he actually broke into the webway. Something no other daemon has ever been able to do (Slaneesh is a god)

And if we add in when Magnus turned to Chaos, that's just a whole new ballgame. All the chaos magicy stuff PLUS daemonhood, mother of god we have a psychic goddamn monstrosity. The sort of thing you would expect to fling titans across the battlefield with a flick of a wrist.

And then Magnus is a primarch to begin with so his willpower is already twice that of any human.