Slann
From BelegarthWiki
The Slann are the Elders of the society. They are highly intelligent and powerful, considered by some to be the most powerful sorcerers and most intelligent beings on the planet. They resemble Humanoid Frogs, except really fat. Slaan are so fat, in fact, that they are pretty much immobile and have to be carried around by Saurus guards.
The last spawning of Slann took place many centuries ago as they live for very long periods of time.