Five hundred years ago, the cat demon Lieyan was still the dominant monster. Because he had a bad temper and acted casually, which caused misfortune to the local people, he was imprisoned by the Heavenly Master in Fulu Mountain during a rebellion. He was finally able to come out after 500 years.
But Su, a certain heavenly master's punishment for him was not only to imprison him for 500 years, but also to have another condition to restore Lieyan's mana. That is to change your past and do 998 good deeds to help others unconditionally before you can recover.
Not 9999, not 100001, just 998, unlimited mana to take home!