So, I'm about halfway through "Prospero Burns", and there's a discussion of the "Wyrds" of the Primarchs going on which is pretty interesting. The basic idea (which has been played with in the other novels as well) is that each Primarch (and thus Legion) was created with a specific role in mind. They mention 7 in the book (and confirm the role of 2), but I'd like to attach names to the other 5 roles mentioned, and maybe think of Wyrds for the remaining Primarchs as well.
The ones from the book mentioned are:
One to be Heir to the Emperor's Throne - Horus (heavily implied enough to be confirmed)
One to Fortify the Defenses of the Imperium - Perturabo (my best guess)
One to Guard the Hearth - Rogal Dorn (best guess)
One to Watch the Distant Perimeter - Guilliman (sketchy guess... but they're way out there)
One to Command the Armies - Lion El'Johnson... or maybe Sanguinus?
One to Control Intelligences - Alpharion/Omegon if they mean military intelligence... Magnus if they mean the control of knowledge
Executioner - Leman Russ (Confirmed by name).
Any thoughts on the other Wyrds? Does my list above make sense? Any disagreements?
To Forge the Weapons of the Imperium - Vulcan
To be the Heart of the Imperium - Sanguinus
To Enforce Order in the Imperium - Night Haunter
To Conquer New Worlds - Angron
To protect the moral health of the Imperium - Lorgar
To gather knowledge - Magnus
Public Health and safety - Mortarion