User blog comment:Primarch11/Guilliman Heresy/@comment-3245042-20120615152958/@comment-3258762-20120615160206

Problem is, there ain't any other Legion fit for Tzeentch. Khorne could get his hands on the Blood Angels, Space Wolves (hard to do, but it could work) World Eaters. Nurgle could get his hands on pretty much anyone since he kinda just infects them. Slaanesh...not sure, but he could get his hands on the Ultramarines for the perfection of discipline

Tzeentch? Nono, he would only want the Psyker-Legion.