I see, so as long as the card is not in play it has all its traits etc, and can therefor be found as a sand snake in the deck, the moment it is about to enter the play it looses its traits (etc) as it becomes a dupe..
It is more accurate to say "it enters play as a dupe with no traits, etc." than to say "it becomes a dupe when it is about the enter play."
The transition from "Sand Snake character" to "dupe" happens as part of the transition from "out of play" to "in play." It's not something that happens before or when the card is "about" to enter play.
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