Exchange 1 set of 7 cards for another set of 7 cards. You can do this multiple times if you exchange a "like-colored" trait as the one removed.
Dominic, is there any way we could get a list of how many of a particular COLOR set are supposed to be in a game? For example, there should be Six Green, Four Red, two yellow, etc... (numbers made up as an example! lol).
I checked the Evolution forum posts and couldn't find anything, but I may have missed something, if anyone's seen such a beast, please let me know
I'm putting together a handy reference chart so we can swap traits in and out as we like, and this would make it much easier than trying to work out what was in the original base game, etc...