User blog comment:Omega natsu2/Chapter 372: Breach, Predictions./@comment-33019320-20140219094024/@comment-4800978-20140219103235

1) It just changed in quantity. The amount of blades seen made As Nodt think it was his Bankai. Also, Byakuya didn't attack As Nodt directly, the Quincy just underwent a gruesome transformation.

2) Rasengans are self-sustaining once complete. There have been many examples where Naruto has passed the technique on to a clone or another shinobi - most recently when he gave a Big-Ball Rasengan to each of the Konoha 11 & co., including Rock Lee who is incapable of manipulating ninjutsu himself.