tsukiyomi himself every moment to meet Itachi and be scolded by him for being a huge ass.
live through this fight (with Kaguya and losing to naruto) again and again until he learns not to be a horrible person, and then the justu will end and he'll be free to say "you know what, I'm sorry for being a dick". like How Kabuto learned from itachi that he shouldn't be (whatever he was being? loyal to orochimaru?)