Board Thread:Warhammer 40k General Discussion/@comment-108.51.155.155-20131208175717/@comment-6078851-20140501014220

technically every primarch is/was a psyker. obviously some were more overtly psychic than others, and the likes of russ and angron simply denied that they were (although their denial didn't alter the fact that they were).

lorgar knew he was a psyker but he couldn't control his abilities with any finesse and thought of his psychic-ness as a curse.