My custom civ relies heavily on a unique unit that has the production of that era's world wonder. Some one recently pointed out to me that this unit could be gifted to any civ by certain militaristic city-states if they are lucky enough to get them. This is game breaking in a lot of ways. How do I make my unique unit off-limits to city-state gifting? If this isn't possible, could I instead make this unit a unique great person? These units provide extra-length golden ages, so it would be really bad if someone were to continuously receive them as if they were just regular units. I also need a way to make it to where the golden age turns that they give the player are not affected by golden age modifiers from Chichen Itza. I know it's a tall order. If some one can just tell me if any of this is possible, I'd be grateful for just that.