As in the original Era Scripts option, if the hero has a creature that can be upgraded to the level from which said dwelling can be recruited, you will be offered to upgrade it for a small fee, but in this case it will be when the external dwellings offer third upgrade creature (this goes hand in hand with the Mithril Enhacements upgrade request mentioned above).
As in the original Era Scripts option, if the hero has a creature that can be upgraded to the level from which said dwelling can be recruited, you will be offered to upgrade it for a small fee, but in this case it will be when the external dwellings offer third upgrade creature (this goes hand in hand with the Mithril Enhacements upgrade request mentioned above).