Board Thread:Naruto Discussions/@comment-4688597-20140416230405/@comment-1512913-20140422151709

@Sochi, no. What the TSB are before anything else is the Ten-Tails' chakra or as in case of Naruto, chakras of all 9 Tailed Beasts + Senjutsu chakra of Hagoromo. Chakra just don't happen to be a nature, it has to be transformed using nature transformation. This is what people don't get. Obito's usage was "at least 4 natures" and then he added YYR. It means TSB's nature composition varies from use to use.