A basilisk is a mythical creature often depicted in folklore as a reptilian monster able to kill with its gaze or breath. In various legends, it is described as a serpent or dragon, and sometimes has features resembling that of a rooster. The basilisk is said to have originated in European mythology, particularly through Medieval bestiaries, where it was depicted as a symbol of death and destruction. The creature has appeared in various forms in literature, popular culture, including the "Harry Potter" series, showcasing its enduring fascination in storytelling.