This kind of reminded me of yu-gi-oh. For instance, that mahjong slow motion lightning descent could be compared to slamming a card down (Which apparently takes 10 seconds for maximum holy crap effect.) and snickering afterwards. Both series take some kind of game and make it into some epic battle srzbzn with over the top visuals, sound and WHAT?!?!?! scenes. They even explain afterwards (or in this case before) what said main character did in strategy/tactics and how much in the realm of impossibility it is to pull something like that off. (Drawing the perfect card or in this case the right tile.) Saw some mahjong summoning creatures in the ED, too.
By the way, they're white.
