The Three Great Monster Lords

I looked downwards and noticed that there were various types of monsters that covered the vast plains in front of Ström Fortress. The monsters looked like waves as they relentlessly charged and struck towards Ström Fortress. Ear-piercing explosive sounds could be heard constantly from the heights of the city walls beyond the fort. Multiple blasts were fired from the magic cannons towards the monsters, creating a reign of terror as the magnificent spells descended from the fort. There were no monsters strong enough to break into the 300 meter radius of the fort. It seemed that the fort’s defences could still be sustained for a while. I looked at the border of the Demon-Beast Alliance and saw that the number of monsters heading to their battlefront was slightly less than ours. However, the monsters still managed to invade into part of their lands. It was unknown how the Demon and Beast races were going to deal with them.