The old wooden door creaked open, letting in the moonlight in the abandoned house. Four teenagers dressed in spooky costumes walked inside. The floor was illuminated by five candles, between which there was a circle of chalk. A girl in a witch costume was holding an old book in her hands and drawing fancy signs inside the circle with her bloody fingers. They all didn't know what they were getting into. I call upon the dark forces. Show your greatness to mortals! ..And you appeared.