at 22% success rate, my kahn card failed 15 times in a row. That is 1500 gems. That is like less than 6.7% success rate. And I did not even succeed. So more like under 5% success rate. The 22% is nonsense. It should be so that when you fail down to 22%, it succeeds at that %. But it doesn't. In theory, it can fail indefinitely. Which is Very broken system.