Guilliman and the Lost Primarchs

[Rhaivaen]

Both Lorgar and Sanguinius have expressed fear about ending up like one of the Lost Legions, and the SW seem to take some pride in having already destroyed one loyalist legion well before the Heresy.

So there we have it. One destroyed in a huge conflict, one was purged for somehow displeasing the Emperor.

Yup, Legion 11, is mine.

Some surviving members may or may not have been folded into the UM, though the author who came up with that has outright stated that it was just meant as a false in-world rumor.

Well feck that writer then I'm using it and sticking with it. it totally fits the narrative for my legion.