shards are practically the most common 'rare' you could find in t50
almost every deck uses them so the chance of winning it is very high, it takes me less than a day to get 6 of them
maybe you're just unlucky or something
btw, nymphomania is a lot better with the introduction of pendulums
i havent test it out yet but once i have enough to up a few, i'll give it a try
