Is Kaguya's ice super ice like Haku's crystal ice mirrors? Haku's CIMs were resistant to ninjutsu and shatter proof due to being infused with his chakra. The ice within Kaguya's ice dimension was able to hold Naruto at bay, who has the physical strength enough to lift giant toad statues and stuff at this point, normal frozen water shouldn't be much of anything to him. Even if it wasn't said, I feel like it's only logical to conclude that Kaguya's ice was infused with her chakra and thus extra hard and durable.