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I believe the reaction effect of Secret Chamber may be difficult to get right, but it will help to assume that we only want to reveal Secret Chamber once.
I've got a bunch of time off coming up and I want to be able to compare Duchess to Secret Chamber to see which really is worse so I will volunteer to take on this one over the Xmas holidays. I may have trouble with the reaction implementation, but if I can't work it out I'll get the mechanics of playing the card as an action implemented.
mark Secret Chamber as done -- fixes #36