The shield falls

"I believe it is time to end this," said Umbryass who was now flying in the air and casting a large shadow over the humans below his gigantic body. The knights gathered behind Yaseen as the frail-looking human knight tightly held the tower shield and waited for the dragon's devastating attack.

CRACK!!! 

A loud sound of glass cracking distracted everyone. The human knights, Umbryass, and even the beasts all stopped whatever they were doing and turned toward the city. Large cracks could be seen spreading on the surface of the force field that was generated by the city walls. Dread filled the eyes of the humans on the wall and inside the city as they looked at the ever-increasing cracks on the force field.