As I read through the Secret History of the Dominion cards, I have noticed that cards moved in and out of sets. One of the surprising points was the Secret History of Adventurer >>>
http://wiki.dominionstrategy.com/index.php/Adventurer#Secret_History, which stated 'I took Adventurer from the 7th expansion.' This had me curious if anyone has built a timeline of the History of Dominion cards
