Black obsidian Shock Carving. Shock is one of Oogie Boogie’s henchmen from Tim Burtons Nightmare Before Christmas.
Black obsidian 
Obsidian is literally molten lava cooled so quickly I had no time to crystallize. As a result, it works extremely fast and with great power. It’s truth enhancing, reflective qualities are merciless in exposing flaws, weaknesses, and blockages. This stone helps you know who you truly are and brings you face-to-face with your shadow self, teaching you how to integrate it. Highlighting how to improve all destructive and disempowering conditions. Obsidian impels us to grow and lends solid support while we do so. Use with care, as it can bring negative emotions and unpleasant truths rushing to the surface. 
Black Obsidian is a powerful  and protective stone forming a shield against negativity and dissolving emotional blockages of ancient trauma. It blocks psychic attack and removes negative spiritual influences. Provides a grounding cord from the base chakra to the center of the earth, it absorbs negative energies from the environment and strengthens in times of need. 
Placing obsidian by the bed or under the pillow can draw out mental stress and tension and may have a calming effect, but it can also bring up the reasons for that stress. Obsidian brings imbalances and shadow qualities to the surface for release, highlighting hidden factors. It magnifies all negative energy so that it can be fully experienced and then released. This healing effect can even go back into past lives and can work on ancestral trauma. Many find these powerful effects very overwhelming but it can be extremely helpful as it not only facilitates getting to the core of the problem, but also mops up energy is released as a result. Cleanse obsidian after each use under running water.