Hi everyone ! I was reading the Book of sorrow and something came to me as slap ! One of the Worms Aurash and her sisters met in the deep is named "Eir" ! So it's easy to see a relation between him and our beloved three eyed crazy ! I didn't see anyone mention it , and with all the threads about the End Credits of the TTK story I wanted to share my thoughts ! So I think Eiris could refer to Savathun , one of Oryx's sisters as her Queen. If you read the grimoire her nature is trickery so it could perfectly fit ! Imagine Savathun organising the murder of Oryx and all of his familly AND have an hive spy infiltrated within the greatest guardians of the City !!! Tell me what you think about this one !