Here's a description of the Southlands.
Far to the South of the Old World, beyond the mysterious realm of Araby and the Land of the Dead, lies the continent known as the Southlands. It's northern landmass is a barren wasteland of deserts, studded with dusty and deserted tomb-cities. While further south, it is a land of unspoiled jungle and swamp, isolated from the realms of Man, Elf and Dwarf for uncounted centuries. Many brave or foolish explorers and treasure hunters- though the two are often indistinguishable- have attempted to penetrate the thick jungles that make up the majority of the southern region of this land, but almost all have never been seen or heard from again.
Ancient legends tell that the Southlands was once joined to the continent of Lustria, and this is borne out by the many identical species of flora and fauna indigenous to both. The hidden city of Zlatlan is said to have been founded before the continent were split asunder and certainly there are Lizardmen to be found on both sides of the World Pond, as the Lizrdmen call the Great Ocean. Over the centuries, various races have set sail for the Southlands, drawn by tales of riches to be discovered within it's unexplored depths, though few have returned with anything other than misery and death. The Elves of Ulthuan have an outpost on the southern tip on the continent, ostensibly to control the sea routes leading to their homeland, but even their fearsome dragon-ships deter reckless treasure hunters sailing towards the Southlands. It is said that the Dwarfs have a stronghold named Karak Zorn on the edge of the mountains that form the spine of the continent, but if this is true, none have heard from it's inhabitant in many years. Perhaps only the Lizardmen of the Southlands know for sure what became of the Dwarfs, but if this is the case, then it is likely that no one will ever learn of the Karaks fate.
None of those who have ventured south to explore the steaming jungles of the Southlands could hack their way more than a few miles into the impenetrable web of trees, vines and swamps without becoming hopelessly lost. Despite the horrendous difficulties inherent in an expedition towards the Southlands, tales persisted of the lost city of Zlatlan, and many conflicting reports as to it's location were presented by those who claim to have seen it's golden, stepped pyramids and glyph-lined avenues. Such discrepancies cannot be accounted as for by simple incompetence, and has led many scholars and cartographers to conclude that there must be many more cities, as yet undiscovered, deep in the jungle.
Cut off from the wisdom of the more venerable of the Slann mage-priests of Lustria, the Lizardmen of the Southlands have prey to their baser, animal instincts and only the younger(in relative terms) Slann, those of the fourth and fifth generation remain in the Southlands to provide any guidance to the Lizardmen. Over the centuries, the Slann on Lustria have attempted to re-establish contact with their lost spawn, but such communication is sporadic and erratic at best. In addition to the loss of their masters's ancient guidance, the few spawning pools in existence spawn less and less frequently and many of the Warrior Lizards such as Saurus do not arise in as many numbers. As a result, Lizardman society had devolved. The spawning pools in the caverns beneath the cities simply do not spawn as regularly as the Slann believe they should, but they accept that it is the will of the Old Ones. Without great numbers of Saurus to fight their battles, the Slann of the Southlands are forced to rely on Skinks to defend them and use the few Saurus which have spawned to train the Skinks in the ways of wars that came so naturally to them. The small number of who were spawned were primarily those destined to become Temple Guard and this has been seen as a sign that the designs of the Old Ones are unfolding as they planned.