Throughout an attack your Hero normally performs two phases of animation; the first when performing the real attack, and the second is "follow-up" after damages has actually been used. The first animation phase have to constantly finish itself, however you can be able to in fact "cancel" from the second animation phase merely by moving if you are a physical assailant, or by purchasing your Hero to "Stop" if you are making use of a casting capability. When it come to physical attacks, canceling the follow-up animation lets you remain on the step after attacking however for casters it in fact keeps you from making use of the capability, saving you from making use of mana for the capability and having it enter cooldown.