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A: A good rule of thumb for any game is that if you find that you have several possible interpretations of a rule, the one that breaks the game is probably NOT the correct way to play.
See also: Does the total effect of playing a card…
Note that if you only see ONE way to play a card, and it seems broken, please do search our FAQ for known errata or clarifications*, or contact us. It could be a typo, or a new interaction that we have not considered.
*The fastest way is to search on the name of the card you’re having a problem with.