Most dominion players notice early on that different kingdom sets have GIGANTIC effects on how the game ends up being played. This also means that some games will end fairly quickly, while others will go on longer.
What Dominion kingdom-card setups tend to lead to the longest games when all players are trying to win? What kingdom-cards specifically tend to contribute most to making games longer? Feel free to give specific setups if you like, but I'm also interested in what cards/combos make for longer games and why/how they do this.
I get that a player in the lead should try to end the game and win as soon as possible, making very long games highly unlikely, but there is still a strong variation in game length due to the cards used and I'm curious what cards tend to be in the setups that are toward the longer end of the spectrum.