The Succubi were “humanized” compared to the fifth installment, resulting in a kind of transitional version between the Succubi from Part 5 and a similar unit in Castle Black.
Incubi are mentioned in the description, but they probably won’t appear as units, instead being replaced by female counterparts. It also states that Succubi possess shapeshifting abilities and illusion-related skills, and it is noted – even comparing them to angels – that they are incredibly beautiful and charming :). Interestingly, they have been given whips; perhaps they will now be melee fighters or support units? Or maybe this is more of an external attribute, like with the Shadow Lords in Part 5 (they fought sometimes, which at least made the unit an average melee fighter).
Bow down and hear our cry,
Our earthly rulers falter,
Our people drift and die,
The walls of gold entomb us,
The swords of scorn divide,
Take not thy thunder from us,
Take away our pride.
G.K. Chesterton: English Hymnal