Board Thread:Questions and Answers/@comment-6061729-20130801032819/@comment-5428123-20130808004822

Or you can just buy the aqua stones directly from other people. Either way, it'll likely cost you an arm and a leg. You mind as well buy new Barb or Petra, since either will likely cost less than this card when it's fully evolved and enhanced (though the card does come with a raid skill).