Last Nul vs Nul War

Last and most devastating Nul War about 15 Million Years ago. After many horrible wars and species wide cathastropies the Nul destroy their own homeworld and strip the world of all water and life. This is called the Darkest Night of Gatu. Out of a cave a small tribe of Nul emerges and one of them is Grey. The Grey leader rises and unifies all Nul. He eradicates all disent and oposition. He ends the reign of the dictator dynasty. The Nul begin to develop past TL 3