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In the novella [[Fury of Magnus (Novella)|Fury of Magnus]], [[Alivia Sureka]] recalls, during her meeting with [[Magnus the Red]], how she had previously met four other Primarchs: [[Horus Lupercal]], [[Roboute Guilliman]], [[Corvus Corax]], and "one whose name she had sworn never to speak".{{Fn|56}} The latter may have been one of the two lost Primarchs, as various other sources have confirmed that others people had sworn, or were also been ordered, to never speak their names, or to discuss them and their Legions, after they were expunged from Imperial records.{{Fn|18b}}{{Fn|40}}{{Fn|42}}