Hey,
Aren't cards in a fortress that doesn't have rules for addition/removal only able to be removed/added during the prep. phase? How is the negating the ability to remove it any different than the a fortress that doesn't describe when to add or remove them?
All cards that can hold other cards have abilities for addition/removal (it's just that some of the time it's not very explicit). The default of during the prep phase is a default that applies to the abilities on the fortresses themselves.
So if the SA of Raider's Camp is negated, the captured heroes go into the territory?
If the special ability of Raiders' Camp is negated the captured heroes just stay where they are.
Tschow,
Tim "Sir Nobody" Maly