After the defeat of the Giants against the Olympian gods, Gaia brought forth Typhon, a super-Giant. He was larger and stronger that any of Earth's other children.
One time Typhon challenged the heavens and the gods were so frightened by Typhon's features that they fled to Egypt and disguised themselves among the wild. Only Athena stood her ground and accused the Great Zeus of cowardice.
Zeus had to defend Mount Olympus so he threw bolts of lightning at Typhon. Typhon fought back with force and cut off several of Zeus' muscles from his hands and feet, leaving him helpless.
Typhon had his sister, Delphyne, guard the muscles in a cave, but Hermes and Pan tricked her and the muscles were returned to Zeus. Zeus became even more distraught and threw more thunderbolts at Typhon. Typhon fled around the world and in Sicily Zeus threw Mount Etna on top of him, which crushed Typhon. It is said to this day that the flames and steam that rise from the volcano are from Typhon.
Typhon fathered a foul brood of other monsters on Echidna from pieces of his body torn by Zeus' stricking thunderbolts: the Chimaera, the Nemean Lion, Orthus (two-headed dog) and Cerberus, the Hydra of Lerne, Ladon (a sleepless dragon that guards the golden apples of the Hesperides garden), the Sphinx, Prometheus' eagle, and Phaea, the Crommyonian sow.