Board Thread:Questions and Answers/@comment-16190015-20140602051933/@comment-25247843-20140811071450

That must not mean, that it is wrong, just that you are very unlucky. I failed many times from +5 to +6 for my feather, but to +7, +8 and +9 I only needed ONE try and it worked. On my other treasures I have far less luck. Severel fails on all levels above +5 or some others fail from +3 to +4 and later they imediatly go up to +6.

A 10% chance doesn't mean that when you fail 9 times, it will work on your 10th try. It really is bad or good luck...