Just a heads up, there's no way you'll be able to play this with the rules included in just the Duels product. Seek out the full rules from the base game to be able to play it.
I've had this a while and finally got it out to play tonight and it was baffling how bad the rulesheet was. We kept saying, "This can't be right..." while playing, but could not make heads nor tails out of what was written.
I'll look up the full rules and try again and hope it's a better experience.