Legion Aerial Assault

Legionbuilder note: There is some ambiguity regarding the optional Vanguard slot. There are differences between the physical and digital copies of the rulebook (which have a Core slot). I own the physical copy so I'll leave it as a Vanguard slot until an official Errata. For now the Vanguard slot has no valid options due to the 'Aerial Assault' formation rule

Dedicated Transports: Any Legiones Astartes Detachment within a Legion Aerial Assault Formation can be upgraded with Legion Storm Eagles or Legion Thunderhawks as Dedicated Transports, at a cost of +100 points per Storm Eagle and +150 points per Legion Thunderhawk

Aerial Assault: All Detachments within the Formation that do not have the Flyer special rule must begin the game Embarked upon a Transport with the Flyer special rule