Board Thread:Warhammer 40k General Discussion/@comment-91.224.27.226-20131031140001/@comment-6078851-20140303034544

that's a theory i've also entertained...

after primarchs are recovered and taught daddy's ways one of the expunged primarchs thinks "are you completely f***ing insane!?! there's no way i'll be a part of that raving lunatic's vision, i'd rather die...", whereupon emps (being a teensy bit psychic picks up that thought) indulges that particular idea and sets his dog on him. the other primarch, seeing how poorly such independant, and loud, thinking went, quickly disappears into unkown space never to be heard from again.