Board Thread:Dragon City Questions and Answers/@comment-99.65.238.250-20130428161617/@comment-198.183.227.2-20130516220142

I also noticed that, but looking into it, the computer is taking a random "hit" from your previous attack and comparing it with a random "hit" of the attack you're replacing it with, so that's why the number changes. The number it displays while you click it won't affect the strength of the attack once it's done training.