Among the Five Great Sacred Grounds, the Eternal Night Royal Family was the only family-oriented force. Unless they have taken in a wife, they would never recruit outsiders. Making them the most firmly united force within the Five Great Sacred Grounds. They have the weakest strength in the five sacred grounds as the other four Sacred Ground heads aknowledge that the Eternal Night King the ruler of the Eternal Night Royal Family is weaker than them. Even though there may be some friction amongst the Five Great Sacred Grounds, there had never been great grievances. But after Xuanyuan Wentian, the current sword master of the Mighty Heavenly Sword Region assumed his position he tricked the other Great Sacred Grounds into exterminating them under the pretense that they were protecting the Profound Sky Continent and that they where exterminating evil, only so that Xuanyuan Wentian could steal the Heavenly Sin Divine Sword.
Before the framing the Eternal Night Queen had saved Mu Bingyun, the Frozen Cloud Ancestor, therefore becoming her benefactor. But when they where framed her power was insufficient and was unable to help them, so after she founded Frozen Cloud Asgard she passed down the truth about the framing, which had long been lost in the flow of time, with the hopes that the future generations could avenge the Eternal Night Royal Family. 
When our Eternal Night Royal Family was exterminated by those scoundrels, you were also murdered bloodily by them at that time.Then, your mother confined a wisp of your soul after your death, and using her own life, she unleashed Eternal Night's taboo technique, so that you could reincarnate after a millennium with half of your blood vessels and soul.