Dragon Lords

The Dragon Lords were yuan-ti bred by the Kror to lead their draconic armies. Their powerful position saw them grow arrogant, and eventually they began to see the Kror as weak intellectuals. Around 4000 BE they rebelled, secure in the thought that the Kror could not stand agaist the combined might of them and their dragons. Thus began the short War of Dragons. In the aftermath the yuan-ti were severely weakened, but they claimed the Ancient Lands for their own. They truly believe that they won the war, though the wisest among them secretly hope that the Kror never return.