If the realm is not perfect, you will never be able to survive the Nirvana Tribulation. Therefore, there are countless monks in this place who are stuck, either unable to perfect their domain or failing to overcome the tribulation. Nirvana tribulation is different from ordinary tribulation. It is extremely powerful and will turn into ashes if you are not careful. Lan Ya explained it quite carefully, and at least Ning Cheng understood it clearly....