The Tsol'aa were first of the mortal races that inhabit Sapience. Created by Sarapis (then split into Ayar and Proteus), they are a tall, slender, and graceful race, often living natural lives for a thousand years. Dwelling in a beautiful redwood forest by the Western Ocean, they developed various types of magic to a high degree, and some became fearful warriors, fighting back goblin hordes that occasionally poured down from the Vashnar mountain range. As a gift from Daedalus, God of Balance, some were given giant spiders as steeds and companions, which they used to augment their already formidable fighting capabilities.

During the Chaos Wars, Daedalus led some of the Tsol'aa, with their spiders, against the forces of the Triumvirate. During this war, however, the Tsol'aa who fought became corrupted by the killing and afterwards began to lust for power. The newly-born human race, they argued, could easily be made to serve the Tsol'aa. This power-hungry group of Tsol'aa began calling themselves the Tsol'teth. They left their racial homeland and settled underground, enslaving many of the weaker goblin races and setting themselves up as fearsome overseers of the violent underground cultures of Sapience.

With the Tsol'teth gone, the remaining Tsol'aa split into two further groups. One elected to remain in their homeland and continue living in the traditional way, studying and furthering their knowledge of both magic and nature. Another, the group that came to be known as the Tsol'dasi, decided that they did not care to be involved in mortal affairs any longer, and left for parts unknown. They have not been seen since.