C278 To Cut the Weeds One must Remove the Roots!!

In his past life, Mei had utilized a fragment of the Great Reincarnation Spell along with a Minor Reincarnation Spell, a process that spanned a millennium. He constructed an incomplete version of the Underworld, bringing together the spirits of the entire Firmament Realm under one banner and amassing an army of a hundred billion specters. This was the source of his formidable power