Board Thread:Warhammer 40k General Discussion/@comment-25618639-20150112024430/@comment-217.234.123.189-20150113194909

actually f.e. gk gene seed improves their powers, as we see in the swordbreaker, who only was a passive psyker when he was with ravenor

and magnus gene-seed did enhance psykers as well, at least that is what the wiki states   " Bearing Magnus’ gene-seed, the XV Legion had a strong predisposition towards psychic mutation and a considerable number of Thousand Sons Astartes inherited their Primarch’s potent psychic capabilities."