As for the existence of The Thirty-three Great Demons, the rulers have always kept it a closely guarded secret, even erasing their history, so that ordinary people had no knowledge of their existence.
Because these beings were too terrifying, letting the general public know would only lead to panic.
Fortunately, although each of the Thirty-three Great Demons was extremely threatening and fearsome, they were not the true leaders of the demons in the strictest sense.
In that great war a hundred years ago, The Thirty-three Great Demons indeed led the demons to occupy the land, but after that, no, even during the occupation of the land, these Great Demons gradually ceased to participate in the war.
