Board Thread:Questions and Answers/@comment-26877581-20151017135412/@comment-139.216.148.160-20151018062559

^You can't "discard" a blueprint mate. Unless one of his ships are missing I don't see how your No.3 is a possibility

@OP Hmm are you sure that you didn't accidentally use it already? Roma is a good possibility for accidental usage. Or maybe Shoukaku Kai Ni? (which needed the deck AND a blueprint)