The world called this phenomenon a beast tide.
Once demonic beasts appeared on the continent, they would destroy what they had built in an instant.
The four countries were afraid of the demon beasts, and the only organization who could keep the beast tide in check was the God Realm. Every time a beast tide appeared, the four countries would tacitly request for the God Realm's help.
Even if the God Realm were to take action, they would be able to curb the beast tide in its entirety.
Every time there was a beast tide, the four countries would act as if they were facing a formidable enemy. However, no matter what plan they cooked up, they could not kill them all. The demon beasts had inherited the devils' fertile trait. As long as a small portion of the demon beasts escaped back to the Obscure Forest, they could still create a terrifying beast tide in another hundred years.
However, how could a million demon beasts be killed so easily?
