If the Invaders get Powers Long Forgotten benefit #2, can they build a City in an empty Sands?
If the Invaders get Powers Long Forgotten benefit #2, can they build a City in an empty Sands?
Yes, if there are more Towns among all Sands than Cities.
All the Invaders are treated as being in the same place for Build (and Explore), so they will often Build in empty Sands, and may well build a City there. Note that each Build is a separate action, so a City built in one Sands could cause a Town to be built in the next one (by changing the answer to "are there more Towns than Cities?").
(Remember you can evaluate lands for Invader actions in whatever order you want.)
