Didn't drop it. It become too much of a distraction. Also, addressing that topic with Booker.
They don't need to be Orochimaru, especially when they lack the sensing about to sense him whereabouts. Bee's tentacle intercepted Minato's attack after using ftg.
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Are you telling Orochimaru, while antipanting him movements can't?! Lol
Nothing stops him from deflects every thrown Kunia. Also, his style normally has him spread them cross the battlefield with one at hand. So idk how many kunia you think he's tossing directly at Orochimaru.
Rasengan is still close range. They'd still be placed. This process of wrapping them away won't be easy as they'd be attached to him, absorbing chakra. Otherwise, he'd be forced to jump. Also, what stops them from turning into hydra?
The seal pretty much requires the opponent to be compliant. There's no way seal would work with the number of opponents present on the battlefield.
Seal? On approach, those snakes scales attack. FCD is used for larger targets dropping from such a height magnitude. He evades it easily.