Editing MidHammer 40,000 (section)

===Perturabo===
Slaaneshi. His natural perfectionism developed into obsession and Slaanesh worship. Essentially replaces Fulgrim and the Emperor's Children as the Slaaneshi Legion.

Even better: TZEENTCH. Pride, envy and the coveting of another's station? Scheming to get around his lack of actual architectural talent? It's perfect for Perturabo. While the other Traitor Primarchs organize against the Imperium at large, Perturabo's actions are done in very particular spite and hatred of his brothers on a personal level. Perturabo has become infamous for his nasty quips and insults, earning him the title Perturabo the Razortongue. His Iron Warriors' minds are gradually being ground up and forgotten, replaced with single-minded bile-spewing hatred of the enemy, and many have begun devolving into Tzeentchian Chaos Spawns, slinging Warpish fireballs and teleporting through fortifications, still able to muster insults, though the mind behind them is all but gone.