Great Race of Yith
These creatures populated the world eons ago and their cities still exist buried in deserts or other out of the way places. They had a highly advanced scientific civilization, with psionics rather than magic. When their civilization was destroyed, some of them were frozen in time, and these are occasionally discovered.
The Great Race are tall cones, ten feet wide at the base, with 4 ten foot long tentacles at the top. Two tentacles end in lobster-like claws, one in trumpet-like ears, and one in a globe with 3 eyes along its circumference with a set of manipulating tentacles depending from it.
The relationship, if any, between the Great Race, the Old Ones, and the elder gods is unclear. Humans discovering and freeing them are sometimes rewarded with gifts of knowledge.