Dualhead Hydra

The Dualhead Hydra is a monster from Final Fantasy Mystic Quest serving as a Fire Fiend of sorts. It can be found in the central room of the Lava Dome. The creature menaces Benjamin and Reuben with its powerful attacks, many of which can cause status effects like poison and petrify. After it is defeated, the Crystal of Fire reverts to normal, and the Volcano erupts.