Varrow-wight

The Varrow-wights are an ancient race of lizard-like folk from the tropical archipelago of Varrow. Surmised to be long extinct, the Varrow-wights help the largest collection of knowledge in all of Uroda until the island of Varrow sank to the bottom of the sea. Many legends and conspiracy theories argue that the Varrow-wights still live, disguised in normal Urodan culture. 
The small island of Varrow contained an enormous collection of astronomical, biological, cosmological and historical knowledge, all catalogued by the Varrow-wights. Due to their astoundingly large brains, Varrow-wights were able to think and observe much more logically then any other race on Uroda. Varrow's capital city, Drumascun, contained the great Library of Gaelar, where all this knowledge was catalogued.
Varrow-wights stood at 7-10 feet tall and had smooth, scaled skin. They were astounding warriors, and would march into battle with slings, taking down their enemies with astounding proficiency. Couple that with their long lifespan (200-500 years) and amazing intellectual capacity, it is no wonder why the scholar Astrius Lovair called the Varrow-wights "A gift to the world from the gods themselves".
The exact reasons as to Varrow's demise is largely up to debate. Uroda's historians are constantly bickering about this subject, with theories ranging from a seismic eruption to the gods becoming jealous of the Varrow-wight's intellect. Either way, since the destruction of Varrow, all of the Varrow-wight's knowledge and culture has been destroyed and lost forever.