This was an order issued by the supreme existence of the Demon race in the White Tiger Sanctuary.

Although the demon emperors didn't know the reason, it was an order from the supreme existence of the Demon race, and they had no choice but to comply.

If they had known earlier that the Humans had such a terrifyingly powerful figure, these demon emperors would certainly not have waited quietly.

Now, saying these things is meaningless; the heavy losses suffered by the Demon race are already a fact.