Board Thread:Naruto Discussions/@comment-34436445-20180627113230/@comment-30323490-20180627204702

I think shadow clones are also one of the more broken ability in the verse.Or clones in general. If there is one ability to counter all these teleportation and space-time ninjutsu abilities in a battle, it would be shadow clones. Realistically, Naruto is the only one who could ever make ridiculous numbers of clones in order to counter these abilities, so in order for shadow clones to truly work at full capacity, you do need somebody with huge chakra pool to pull off a good multi shadow clone jutsu. With shadow clones Naruto could even overwhelm Kaguya and force her into retreat.

There is also Naruto`s trick to restore his chakra via shadow clones that absorb Nature Energy for him. It was a Kurama shadow clone that ultimately absorbed NY for Naruto in order to match Sasuke`s Bijuu Susanoo. There is also the training trick with the shadow clones that speeds up the training process lot. Shadow clones also retains the users abilities (with the exception of unique things like TSB).

But again, all of these work if the user has huge chakra reserves. So shadow clones + huge chakra pool is pretty damn OP.