Typhoeus The Father of all monsters

Typhoeus or Typhon was considered the mightiest and deadliest monster in Greek mythology. He was the last son of Gaea and Tartarus, created as a last attempt to repel the Olympian gods from defeating the Titans during the Titanomachy.

The Father of all monsters
Known as the "father of all monsters", Typhon was a fire-breathing dragon who had one hundred heads that never slept. After the Titanomachy, Gaea wanted to punish Zeus for imprisoning her Titan children in Tartarus; thus, Typhon was born.

Typhon marries Echidna
Typhon was married to Echidna, who was considered as the "mother of all monsters". The two of them had a number of children, including:
— the Sphinx, sent by Hera outside Thebes and killing anyone who could not answer her riddles. Oedipus answered correctly, and Sphinx, enraged, drowned herself in the ocean.
— the Nemean Lion, which had impenetrable skin. Heracles was asked to kill it as part of his Twelve Labours.
— Cerberus, a three-headed dog that became the guardian of the Underworld.