Pretty card but the attack cost is worthless, especially in an age where dragon types are starting to only need one type of energy. If the attack cost was something like [P][P][M], or [P][M][M] or even [P][M][C][C], it might be somewhat usable, but the current attack cost is just too clunky, especially since it requires you to discard all of them (although, I feel like the "may" was lost in translation since it'd be forcing you to do 200 damage whether you wanted to or not if both yours and your opponent's prizes added up to 6 or less.)
On the other hand, that deck box is really neat. I haven't played TCG for a while but I'd definitely use that to carry my 3DS. Here's hoping it comes to the west
(although that's unlikely since it would mean Japanese players could just use Ebay to get it, even though this competition is aimed at Japanese players, and thus, would nullify the point of the competition).