Setting:Brighthammer 40,000/Eldar
When the Bright Eldar were betrayed by the Craftworld Eldar, Slaanesh was left to fend for himself as the Eldar Pantheon led by Khaine attempted to murder all those whom refused to join them to serve the old ones. The Craftworld Eldar worship these gods whom they see will bring forth the victory of the Old Ones.
Isha was the deposed queen of the Eldar, giving birth to mostly maleviolent mortal children by her husband Asuryan. Khaine spited most of them and ordered Vaul to make him 100 blades to cause the most amount of suffering on Isha and Kurnous. As following the myth, a war in the heavens began with Khaine being the victor after causing death and agony to the Eldar worlds. eventually in the midst of Khaine's bloodlust, she prayed for a god that will be able to love and have compassion unlike the bloody pantheon of gods who have orchestrated a plan to cause countless cases of abuse to her. Thus was born Slaanesh. Slaanesh, the goddess of love and compassion attempt to reason with Khaine and Asuryan's second hunt. However in Khaine's anger, he had murdered most of the Eldar gods before being restrained by Khorne and leading Slaanesh to their pantheon where they keep Isha safe from Khaine's ire and the Laughing God's attempt to bring forth disaster.