In a way, Mortarion did get that. After the Second Battle of Prospero, Mortarion raided the former Thousand Sons protectorate world of Terathalion. He took everything Magnus had collected related to warp-use, summoning, and protection, and was basically using it all to self-teach himself how to banish and control daemons, with the understanding that his traitor allies were embracing sorcery far more than he was comfortable with.
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