Board Thread:Naruto Discussions/@comment-38792431-20200226192508/@comment-732150-20200227165004

Go watch read it again. FD is used as a stream, not as an aoe, and even then, Kakashi's got slightly hurt, meaning Kakuzu's B-rank pushed enough against his S-rank one to do something. Still no counter for FTG example, and kekkei genkai. Go read 312 again as well, Kakashi explicitly says that shape transformation is that is used to set range and power, and that is precisely why Rasengan is an A-rank jutsu, despite having no nature transformation involved, because it otherwise packs so much shape transformation.

@Squinty97 I think that by metallic skin he meant the Raikage's natural toughness, same thing that allows Fourth Raikage to survive Mabui's Heavenly Transfer Technique. The fact he called it metallic skin shows how unreliable his knowledge is.