It would be much better if they actually made it luck-of-the-draw. People will want you to believe that it is, but it isn't. If you want to test how the flipping of cards in tynon is not a luck-of-the-draw thing, but rather a pre-determined conclusion, here is how you can do it. Go to your guild treasure chest and click on unlock, look at what you have showing, close by x-ing out(do not pick a card), click on unlock again(this isn't costing you any more since you didn't pick a card), again look at what you have showing, even if everything else is different at least one item will be the same, and no matter how many times you close and unlock that item will still be there. That is the item you were meant to get, and will get, no matter which card you choose on the flip. The only thing that might change is your jewels(if it was a ruby, it might change to a diamond etc...), however, if it was a level 2 ruby, it will still be a level 2 of whatever jewel it changed to. That's is how you know it has NOTHING TO DO WITH CHOOSING THE RIGHT CARD!