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Variants and Fan Cards / Re: Copper-Based Spy/Witch Attack
« on: January 06, 2015, 05:28:18 pm »GendoIkari is correct. The "may/otherwise" on Bookkeeper is not there to provide an interesting decision, but rather to make it so the card doesn't whiff. Unlike Mountebank, the "main" attack of Bookkeeper is meant to be the one you may choose to do: putting a Copper on your deck. The Copper gain clause is there so that Bookkeeper still attacks when the target has no Copper in his discard pile (unless the Copper pile runs out). It's fewer words than making the target reveal a discard pile with no Copper. And if the decision turns out to be an interesting one more often than Mountebank's decision, great.
There is something weird about this though.... if the Copper pile does run out, then the "main attack" stops working, because they can choose to gain a copper and fail instead. This is weird because the "main attack" shouldn't be affected by an empty copper pile. Maybe it's just because of Mountebank, but to me, the main attack here is gain a Copper, and there is a Mountebank-like clause that allows you to Bane the attack.