Board Thread:Naruto Discussions/@comment-24048522-20191229052502/@comment-37982756-20191230023311

The only reason she had all her "original powers" was because of the God tree's chakra fruit she ate back in the day. It's what the Otsutsuki do. They sustain themselves by ingesting chakra and thereby retain their powers and eternal youth. Kaguya was supposed to harvest the fruit and having ingested the fruit herself, failed the mission she was responsible for as Momoshiki mentioned. Even before coming to Naruto's world, Momo and Kinshiki destroyed a lot of worlds together and harvested/ingested multiple God trees during their pursuit of Kaguya which inherently makes them stronger as Kaguya only ever ate one chakra fruit. Also why would Sasuke be worried about a threat greater than Kaguya if they are all weaker than her anyway?? This might be interpreted as him being worried about a possible Otsutsuki clan invasion but considering Momoshiki's confidence and casual arrogance, it seems unlikely that she would have an army against her. Momshiki and Kinshiki were the ones tasked with her retrieval and would've done so if it wasn't for her sons' betrayal.