It is an Acquired Immortal Treasure of a very high caliber, and the Soul Destroying True Light that it is capable of releasing contains some type of law power that could directly harm one’s soul. Aside from that, the black cloud space that it carries is also quite a good trapping device.
Archive Field record
Black Inkstone ( Acquired Immortal Treasure)
Black Inkstone ( Acquired Immortal Treasure) — a archive record in the Mortal Journey Archive.