Echidna is known as the mother of all Greek monsters. She is the mother of the Sphinx, Cerberus, the Chimera, Orthrus, the Nemean Lion, the Lernaean Hydra and many other Greek monsters.
She is married to Typhon, the god of wind, and is part serpent. Since she is part nymph, she does not age. She clashed with he ancient Titans of Myth and later with the Justice League of Europe and Wonder Woman. She offered to train Kara as payment for releasing her teammates from Echidna's power and realm.