Board Thread:Warhammer 40k General Discussion/@comment-112.207.234.222-20160507120912/@comment-27518460-20190520020844

Both post-heresy Fulgrim and Horus Lupercal have to be discounted. Fulgrim ascended to Daemon Prince status in Angel Exterminatus and Horus became possessed on Davin IV. Both have shed their Primarchdom a long time ago. Fulgrim was possesed by a "Keeper of Secrets" when he decapitated Ferrus Manus on Isstvan V. Fulgrim's conscoiusness was imprisoned within the painting in La Fenice aboard the Pride of the Emperor while the Greater Daemon of Slaanesh galavanted throughout the universe sowing discord in Fulgrim's mortal shell. It was the Daemon, not Fulgrim that brought the Emperor's Children into the fold of Chaos.

If anything, Fulgrim is one of the weakest, having his and legion's vanity and arrogance used against them by Slaanesh. Well, the entirety of the Legion save Saul Tarvitz and a few others.