It's a Space-Time technique. Orochimaru couldn't only because, he was such in a bad state he couldn't even move his hands [You must be registered for see links]. His health varies, but no doubt he didn't have access to Ninjutsu itself.
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Its ninjustu, he didnt have his arms so he couldnt do it in part 1 but he regained his arms for a short period which then allowed him to do ninjustu.