A basilisk is a legendary creature often depicted as a serpent or lizard with the ability to kill with its gaze. In various myths, it is said to be born from a chicken's egg hatched by a toad. The basilisk is known for its deadly powers and is sometimes referred to as the "king of serpents." In medieval bestiaries, the basilisk symbolizes danger and fear. It is often associated with alchemy and heraldry, where it represents destruction and the power of the unknown. The creature has appeared in literature and popular culture, including Harry Potter, where it is portrayed as a giant serpent.