If seen in the distance, it might look like it was just some sort of turf war but if you look at the battle closely, everyone is raising their weapons up high with burning spirit while the monsters are just swarming through, like a wave from the sea washing through the land. Both entities are created from the darkness, one from the scourge, and one from the realm of the dead, the afterlife but in the end, they stood on different sides and that is enough to spark a big fight between the two.
The swarm of the monsters is no longer something my AOE magic can handle and even with the guns and bows and arrows in the fray, they are no longer enough to handle every monster coming in. The skeletons carrying melee weapons started to also take action themselves.
"Don't die, guys! Prioritize your safety. If things are not looking good, retreat!"