Fūjutsu Kyūin has no limits when it comes to offensive based Ninjutsu, since there is no information in the manga which implies a contradiction has occured, unlike, say, Amaterasu (since we've seen that it cannot be as hot as the sun as it did not destroy the atmosphere). Regardless of the form the chakra takes, be it feathers, lightbulbs, or in this case, trees, Preta Path will spin the chakra within one's body in the opposite direction. The 'life' which Shodai is giving his trees is nothing more than his very own chakra - as stated
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. Again, there is nothing to distinguish between Mokuton and any other form of ninjutsu, since Yamato himself has stated that it is merely the
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of Suiton and Doton; again, this has been stated in the manga. The only time Mokuton will resist being absorbed is if Hashirama manipulates pre-existing seeds or plants in the environment, pumping his chakra into them and forcing them to grow. This would be exactly the same as what Gaara does with his sand, where Madara was only able to absorb the chakra, not the substance. Hashirama cannot use Creation of all things, he cannot create something out of nothing. His techniques are all sourced from one place (his chakra) and are merely chakra in another form.
