However, he also noted that, as he has since left Games Workshop, the idea never made it into a published source, and II/XI have since been confirmed to have been deleted several decades before the Heresy, this cannot be taken as canon. If this is true, then this would explain why they, but not the nine unrepentant Traitor Legions/Primarchs, were completely lost to history. Rick Priestley, the inventor of the Lost Legions concept, has said that his personal theory was that they had committed terrible crimes of some sort during the Horus Heresy, but ultimately redeemed themselves, and were allowed to be 'forgiven and forgotten' as a result. Redemption Equals Death: One possible interpretation.Historical In-Joke: They were originally a reference to Rome's 17th, 18th, and 19th legions, who's numbers and symbols weren't used again after being wiped out.

Fast-forward to its release, and the only mention of the two Legions and their Primarchs in the drama is an off-hand comment about how, out of the twenty Space Marine legion symbols on the door to the Emperor's old gene-labs, two had apparently been scratched off or worn away. When the cover art was revealed prior to release, many fans speculated that it would finally reveal key information about the Legions and/or their fates (something which Games Workshop even hinted at in the article revealing the cover art).

Covers Always Lie: The cover art for the audio drama The Sigillite depicts Malcador the Sigillite sitting on a throne, which has a pair of skulls - each marked with the Roman numeral for one of the lost Legions - integrated into each arm rest.

Ambiguous Ending: At some point, they simply disappeared from all the records, and the only people who know what happened are quick to cut off any train of thought that would lead to answers.

Primarchs II and XITwo Primarchs who were, along with their Legions, completely erased from all records and history so thoroughly, nobody knows what happened.

Horus heresy tv tropes