The Greek god Hercules killed the Lernaean Hydra.
The Hydra was a monstrous serpent with multiple heads, each capable of regenerating when severed. It was a symbol of chaos and destruction, and its defeat was a pivotal moment in the story of Hercules' twelve labors.
Hercules was tasked with slaying the Hydra by King Eurystheus, as part of his twelve labors. He faced many challenges during this task, including the regeneration of the Hydra's heads and the venomous breath that could poison even the strongest warrior.
To overcome the Hydra's regenerative ability, Hercules resorted to a clever strategy. He would sever a head and immediately cauterize the wound with a burning torch, preventing the head from regenerating. However, the Hydra also had a venomous head that was immortal, and Hercules needed to use his strength and cunning to defeat it.
In the end, Hercules managed to defeat the Hydra by burying the immortal head under a large rock. This victory marked a significant achievement for Hercules and solidified his reputation as a powerful hero.