Lith

The Lith are a extra-planar hivemind-like race from an unknown world. They are ethereal by nature and cause horrors within their enemies minds, often permanent. Myth tells the race was created by the chained god, Therizdun, by twisting the native inhabitants souls of an unamed plane. The Lith were prepared specifically to destroy Annora by Therizdun before he was imprisoned.

The Lith are an ancient threat introduced long ago. It is believed none have ever been on Annora.

History
Lith translates roughly to "spirit devil" in an ancient dead tongue from the races home plane.

The Lith were brought to Annora after an ancient secret gate between planar structures was found burried on the plane. The gate was built as a way for the lesser Primordials to travel between the planar structures.

The Lith, seeing new worlds beyond the gate, began invading nearly immediatly. They ravaged and destroyed all in their path with little resistance during the Lith Incursion.

After the gate was sealed and the Lith on Annora were destroyed, Annora was left a desolate waste. Three Wardens, seeing the greater expanse of the multiverse beyond their own, repurposed the gate to travel beyond the world of the Lith in secret. Once complete, they adventured to new worlds.

Therizdun created the Lith not because he wanted the world destroyed by them, but to lead the Wardens to new worlds where he knew they would become corrupt and work with the views of the primordials.

Impact on Annora
During the crusade across Annora, the Lith twisted and created hundreds of new creatures that would evolve into new creatures on Annora. So many in fact, it's nearly impossible to trace their true heritage.