The young general of the Yu Family from Anlin Kingdom, Yu Huai, was only sixteen when he just came back from the border, and he detected his full Aptitude Talent with a Dark Spirit Root thanks to this piece of jade.
He was about to set off for Immortal Mortal Island to step on the Path of Immortality when his steps were halted by a sudden outbreak of Evil Ghosts in Annai Kingdom.
City after city perished, souls were either devoured or assimilated; there wasn't even a chance to seek help from Immortal Mortal Island.
In the capital of Anlin Kingdom, it was thanks to this Spirit Level Defensive Magical Instrument that they managed to hold out for half a year amidst the Evil Ghosts' siege.
During that half-year, Yu Huai, with his Spirit Root Talent, self-taught himself ways to counter Evil Ghosts without any mentor.
