Orthrus is a creature from Greek mythology, often depicted as a two-headed dog. It is the offspring of Typhon and Echidna, making it a sibling to other famous monsters like the Chimera and the Sphinx. Orthrus is known for guarding the cattle of the giant Geryon and is described as a fierce and loyal protector. In the myth of Heracles, Orthrus meets his end when the hero is tasked with capturing Geryon's cattle. Heracles defeats Orthrus with a single blow, showcasing his strength and bravery. This encounter highlights Orthrus's role as a formidable guardian in Greek legends.