“Hydros,” Achilles said. Water-snake. It was dun gray, and its flat head hung brokenly to the side. Its body still trembled a little, dying. Weakness sluiced through me. Chiron had made us memorize their homes and colors. Brown-gray, by water. Quick to anger. Deadly bite. “I did not even see it,” I managed. He threw the thing aside, to lie blunt-nosed and brown among the weeds. He had broken its neck. “You did not have to,” he said. “I saw it.”