For 10 points, identify this monster whose cattle was the subject of the tenth labor of Heracles.
This figure met his end in a battle at the Anthemus River, and in one story this man's home was reached by a traveler riding in a golden cup given to him by Helios. This figure's home of Erytheia is often associated with Tartessos, and he is served by the watchman Eurytion. This figure is the offspring of Chrysaor and Callirhoe and has (*) three bodies with two heads and one arm, and his two-headed watchdog Orthus guards his most famous possession. For 10 points, identify this monster whose cattle was the subject of the tenth labor of Heracles.
This figure met his end in a battle at the Anthemus River, and in one story this man's home was reached by a traveler riding in a golden cup given to him by Helios.
Geryon