With a loud rumble, the ground began to shake, and numerous cracks appeared on the ground's surface. The biggest crack was big enough for a human to fall in! It was sized such that if one were lucky, he would be able to climb out. However, with the ground falling apart, he would probably fall into another crack right away.
This was Leon and the dragon's fighting ground, and this devastation of the ground had been their combined effort.
The first one to blame for the destruction would be the dragon, as he was stronger than Leon but not as accurate. When he attacked, Leon could focus his attack to where he wanted it to go, but the dragon could only aim within a certain range. Every time it attacked, even if it did not manage to hit Leon, the surrounding ground would be destroyed. Leon would only cause destruction around him when his attacks failed.