The Dualhead Hydra is a monster from Final Fantasy Mystic Quest, the Fiend of Fire and one of the Vile Four. It can be found in the central room of the Lava Dome. The creature menaces Benjamin and Reuben with its powerful Fire Breath and many status effect attacks. After it is defeated, the Crystal of Fire reverts back to normal, and the Volcano erupts. Dualhead Hydra is later reincarnated as the Twinhead Wyvern in Doom Castle.
Hydra was one of the spawn of Echidna, a many-headed serpentine monstrosity in Ancient Greek mythology. It could breathe poison, and indeed its very blood was deadly. The Hydra was killed as one of Heracles's Twelve Labors.The
- When one of Dualhead Hydra's heads is slain, the remaining head takes over the entire body, the neck stump of the second head vanishing. This is in contrast to its namesake, which was said to grow more heads when one was sliced off.