Unknown Power…!! (未知の能力…!!, Michi no Chikara…!!) is chapter 271 of the Naruto manga.
Kakashi tries to get Naruto to calm down so that they can team-up against Deidara, suggesting a plan that will utilise both of their strengths. Meanwhile, Sasori cannot understand how Sakura is able to move after being poisoned. When he sees her healing her injuries he realises that she is a medical-nin and that she has perhaps created an antidote. Since this would mean she is no ordinary opponent, Sasori gives up on other puppets and removes his robe, revealing that his body is a puppet too. He attacks Sakura and separates her from Chiyo, and then turns his attention to the defenceless Chiyo.