This incredibly powerful vessel is indeed a phylactery that is used to harbor the soul of the Necromancer who seeks immortality and complete control and mastery over the forces of Death and Undeath. The Sign of the Lich is present within and has been placed there with blood-based ritual ink. The stone within the enchanted phylactery vessel has also been imbued with immense power as it is both a symbol of the keys to necromantic mastery by unlocking the mysteries of death magick and the beyond, as it is a ‘key’ element in the process of apotheosis. As an open vortex, it awaits its Master or Mistress to anoint cloth with their blood and place it within the phylactery vessel to join their soul with the Eternal Grave, the Infernal Underworld known as Keraktes, its ruling Lords such as Zazazel, Nhilmice, Matrigal, Alyrune, Mephilure, Sirah, and Adael.  Further, by its enchantment’s extensive range and power, all things have are dying or have recently died have their life essence as well as the death essence extracted and funneled into the phylactery to further empower it.  Necromancers who acquire such a phylactery vessel display a heightened sense of all things relating to Death.  A continual current of necrotic essence flushes through the Necromancer, empowering death magicks and rituals of the like.  Sensitivity toward Spirits is further bolstered.  This is a grand death relic that fully embodies immortality.