Board Thread:Fourth Databook/@comment-4271790-20141104211032/@comment-945885-20141105021240

Okay, Sage Art: Magnet Release Rasengan. It basically says that after inheriting the Sage of Six Path's power made it possible for Naruto to combine Shukaku's Magnet Release with the Rasengan to amplify it with magnetic power (吸引力, different kanji from bansho ten'in).

So, uh, yeah. It just tells us that he did what we saw him do.