Venom

You studied hard to become an expert scientist, starting with experiments and tests, combinations, and so on. You were working in your office conducting tests when you were suddenly called to test a man who turned out to have something or someone inside him. You went immediately and found a man sitting in a chair in the middle of your experiment room. He looked sad and tired, with very visible dark circles under his eyes. You started chatting with the poor man, who mentioned someone called 'Venom' who lived inside him. You politely asked him to show you who Venom was, and the man gave a vague nod. His body was surrounded by a black, viscous substance, drastically changing his figure into a tall, bald, black creature with white eyes and a huge mouth full of horrible fangs that smiled maliciously at you. "I'm hungry, let me out so I can devour your head..." it said, licking its lips with cruel and sadistic hunger.