Hydra

The Hydra was born from the union of two of the most terrible beings in Greek mythology: Typhon, the hundred-headed storm-giant whose body was covered in serpents and whose roar shook the pillars of the world, and Echidna, the creature who was half beautiful woman and half venomous serpent and who made her home in a cave deep beneath the earth. Together they produced a brood of monsters that would haunt the Greek world for generations. The Nemean Lion, whose golden hide was impenetrable to any weapon, was their firstborn. The Chimera, a fire-breathing beast with the head of a lion, the body of a goat, and the tail of a serpent, followed. Cerberus, the three-headed hound who guarded the gates of the Underworld, the realm of the dead ruled by Hades, was another of their children. But the Hydra was perhaps the most dangerous of them all, because she combined the poison of her mother with the regenerative power of her father, and she made her home in the swamps of Lerna, a region near the city of Argos in the northeastern Peloponnese, where the waters were already foul and the air thick with miasma.

The Hydra's lair was a spring called Amymone, near the town of Lerna, where the water was dark and the reeds grew thick enough to hide a creature of enormous size. She had anywhere from five to one hundred heads, depending on which poet told the story, and at least one of them was immortal, meaning it could not be killed by any mortal means. Her breath was poisonous, and her very presence tainted the water and land around her. The people of Lerna lived in terror, and their cattle and crops withered as the swamp spread. When Heracles arrived to perform his second labor for King Eurystheus of Tiryns, the king who had devised twelve impossible tasks believing the hero would never survive them, the Hydra was waiting. Eurystheus had sent Heracles to kill the beast and bring back proof of its death, but he had chosen the labor specifically because he knew the Hydra's regenerative power made her nearly impossible to destroy.

Heracles approached the swamp with his nephew Iolaus, the son of his half-brother Iphicles, who had agreed to serve as his charioteer and companion. Heracles began by firing flaming arrows into the Hydra's lair, driving the monster out into the open. As soon as she emerged, she lunged at him with all her heads striking at once, and Heracles fought back with his club, the massive weapon he had carved from the trunk of an olive tree. But every time he smashed one of the Hydra's heads, two new heads sprouted from the bleeding neck, and the monster grew larger and more furious with each wound. Heracles found himself overwhelmed by the sheer number of heads, and the battle might have ended in his death if he had not thought to call Iolaus to his side. Iolaus seized a burning torch and, as Heracles cut off each head, Iolaus cauterized the stump with fire, sealing the wound so that no new heads could grow. Together they fought their way through the writhing mass of serpents until only the immortal central head remained.

The immortal head could not be killed by any weapon, so Heracles cut it off with a golden sword given to him by the goddess Athena, the grey-eyed goddess of wisdom and war who had favored him since his birth, and buried it beneath a massive rock near the road that led from Lerna to Elaeus. The rock was so heavy that no mortal could move it, and the Hydra's immortal head would remain trapped beneath it forever. Heracles then cut open the Hydra's body and dipped his arrows in her poisonous blood, coating their tips with a venom so potent that even a scratch would bring agonizing death. These arrows would serve him in countless battles to come, and the poison would one day play a role in his own death, when the centaur Nessus, dying from a wound dealt by one of these very arrows, told Heracles's wife Deianira that his blood was a love charm. She smeared it on Heracles's cloak, and the mixture of Hydra venom and centaur blood burned through the hero's flesh, killing the strongest man who ever lived.

The Hydra's defeat became one of the most famous episodes in the cycle of Heracles's labors, and her image appeared in Greek art for centuries. She was painted on vases, carved on temple metopes, and described in epic poetry as the ultimate test of a hero's resourcefulness. The constellation Hydra, the longest constellation in the night sky, was named for her, and its head is marked by a bright star near the celestial equator. In the modern world, the word "hydra" has entered common language as a metaphor for any problem that grows more complex the more one tries to solve it, from political insurgencies to biological cell structures. The monster of Lerna remains a warning that some threats cannot be defeated by brute force alone, and that the fire of cunning must always accompany the sword of strength.