The hero Phorbas killed a bunch of these creatures on the island of Rhodes, and the Seven Against Thebes killed one of these creatures after it killed the child Opheltes. Metanira gave her son Triptolemus a chariot drawn by these creatures. Hermes stole the sinews of Typhon from one of these creatures named Delphyne, and the heads of one hundred of these sprang from Typhon's arms. In a dream, Clytemnestra gave birth to one that fed on her breast milk and clotted blood. The Sparti were born when Cadmus sowed the teeth of one which was sacred to 
The hero Phorbas killed a bunch of these creatures on the island of Rhodes, and the Seven Against Thebes killed one of these creatures after it killed the child Opheltes. Metanira gave her son Triptolemus a chariot drawn by these creatures. Hermes stole the sinews of Typhon from one of these creatures named Delphyne, and the heads of one hundred of these sprang from Typhon's arms. In a dream, Clytemnestra gave birth to one that fed on her breast milk and clotted blood. The Sparti were born when Cadmus sowed the teeth of one which was sacred to Ares. Hera sent two of these creatures to attack the infant Heracles, who strangled them. For 10 point, identify these animals which comprised the tail of the Chimaera and the hair of the Gorgons, including Medusa.
The hero Phorbas killed a bunch of these creatures on the island of Rhodes, and the Seven Against Thebes killed one of these creatures after it killed the child Opheltes.
{Dragons} [or {serpents} or large {snakes}, accept {she-dragon} or {half-dragon} before “hundred,” prompt on {Delphyne} before mention]