A clan as a dying entity.

Private or not, but 2 minutes in a 5-player game means closing the game, looking at the skill wheel, and opening it again :D

Where did you get 3 minutes from?

I have no idea, I just remember that number.

Here, in Jebus Cross 2, it says 10 minutes.

Yeah, they replay the same map from game to game and spend another 10 minutes making their moves :)
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I had a thought about "no players."

There are players, there are. Maybe not a huge number, but there would definitely be enough for a couple of clans.