are you even listening to yourself? its a sage art if its using sage chakra. oro need not explicitly say it is because we know all senjutsus are senpou
You obviously don't know how Senjutsu works that's why you are making these ridiculous claims.
Oro isn't even a Sage so he can use Sage Arts so that idea of yours goes out the window.
Curse Mark isn't a Sage Art, it is basically Orochimaru transferring his Natural Energy to the target through a bite and whenever the curse mark is used, Oro's Senjutsu chakra invades their body while their normal chakra is absorbed.
Made with Senjutsu chakra=/=Sage Art. Obviously there's a difference.
Don't see how this shows Hashirama isn't a Sage anyway, he used a Sage Art after going into a mode. Obviously Sage Mode.
Only Sages use Sage Arts, Oro is not a Sage so he can't use a Sage Art.
its never said the black eyeshadow is because they are trying to become a toad. naruto was perfect cos he didnt look like a toad
But he still got the
eyes of a toad. Why would a toad need these characteristics if they already have them? Doesn't make any sense. Its obvious the Shima and Fukasaku are Sages, hence them being called the two great sages and having the ability to draw in natural energy and use Sage Arts.