Skull Wyrm

This creature is a massive, fearsome beast, with gray scales covered in copious amounts of dirt. It is the size of several large buildings stacked on top of each other, its body twisting and coiling like a massive serpent. Its skull-like face is adorned with two glowing orange eyes that seem to burn with an unquenchable fire, and several sharp teeth that glisten menacingly in the dim light.   The creature stands guard at the entrance to a lost civilization, in a forgotten land that has long been shrouded in mystery and legend. It is said that the entrance leads to an advanced civilization, a place of untold knowledge and insight, but none have ever been able to penetrate the defenses of the wyrm, for its power is great and its ferocity unmatched.   As the story goes, many have tried to defeat the wyrm, but all have failed. Those who dare to approach it do so at their own peril, for the wyrm will not hesitate to unleash its terrible wrath upon any who would threaten the secrets it guards.