Marilith

"the power of burning flame is mine and mine alone!"

After defeating the Fiend of Earth, Lich, the Warriors of Light travel by ship to Crescent Lake to seek out the famed Circle of Sages led by the prophet Lukahn. One of the sages gives the Warriors of Light a canoe, so they may travel on rivers to reach the volcano Mount Gulg, where Marilith had lain dormant by the Fire Crystal until Lich's demise disturbed her from slumber, two hundred years before she was due to awaken. She attacked the nearby village in anger upon learning of Lich's fate. At the bottom floor of the lava-ridden volcano, the Warriors of Light defeat Marilith and the Fire Crystal regains its glow.

-----Etymology-----

A marilith is fictional creature in many official Dungeons & Dragons campaign settings. A marilith is depicted as a powerful, six-armed female demon with the lower body of a snake. Mariliths in Dungeons & Dragons are based on Hindu mythology, where gods and demons frequently have multiple heads and arms.