Obsidian dragon

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Obsidian dragons were the most intelligent of the gem dragons, but also the most dangerous. They had smooth, black, glass-like scales that had razor edges and they could breathe a cone of fire. They preferred to lair near volcanoes, and were notable for their psionic abilities.

History
Some obsidian dragons, like all gem dragons, once lived at the Ruby Palace of their deity Sardior. But at some point their leader, the thane Seradess, was killed by the Master of Gem Dragons for reasons unknown, and all obsidian dragons were expelled from his court. Their evil nature, exceptional among gem dragons, was often connected to this fall from grace. The obsidian dragons were avoided and opposed by the other gem dragon races since that time.

Notable Obsidian Dragons

 * Seradess