The mythical creature that inspires fear due to its horrifying appearance is the Chimera, a fire-breathing monster in Greek mythology. With a lion's head, a goat's body, and a serpent's tail, the Chimera represents the fears of the unknown and the chaotic forces of nature. Its terrifying form evokes dread and exemplifies the clash between humans and monstrous beings. The Chimera's defeat symbolizes triumph over chaos, making it an enduring figure in mythological literature and art.