From the darkest of caves rises a sombre character with eternal purple flames on its back with temperature unbearable to any other living thing. Whatever you do, don't show your fear.
For an unknown reason, the shadows in its first and last form are black, but the shadows in its second form are purple. The skin is always dark gray, with one or more purple stripes.
It resembles Durin's Bane, the Balrog from The Lord Of The Rings: The Fellowship Of The Ring. In the movie and in the book, Balrog were ancient demons from Earth's darkest depths.
Dark Fire was the name of a metal band in the 80s. It lasted only a few months.