"Explode! Sage Mode" (爆発! 仙人モード, Bakuhatsu! Sennin Mōdo) is episode 163 of the Naruto: Shippūden anime.
Naruto is summoned by Shima along with Fukasaku, Gamabunta, Gamakichi, Gamaken and Gamahiro. They are all visibly surprised to see Konohagakure utterly destroyed. Knowing full well that Pain is responsible, Naruto confronts him. Tsunade intervenes and challenges to fight Pain instead, but she proves to be helpless since she used all of her chakra to heal the villagers from Pain's assault. Pain, through the Deva Path, informs her that she is not the one he seeks as the rejuvenated Asura Path moves to attack her. Naruto intervenes, destroying the Path with a Rasengan, and orders Gamakichi to take Tsunade to a safe place and to inform everyone not to interfere in his battle with Pain. Before beginning his battle, he reveals that after mastering senjutsu, he is able to sense chakra signatures, and inquires why he cannot sense Kakashi's, before realising that Kakashi has been killed. Sakura is told by a member of the Hyūga clan, who is using his Byakugan to witness the battle since dust clouds are obstructing Naruto and Pain, that Naruto has destroyed a Path using a single blow.
The Animal Path uses Summoning Rinnegan to summon a Giant Multi-Headed Dog, a Giant Ox and a Giant Rhino. Naruto throws the rhino into the air and hits the other two creatures with his Sage Art: Big Ball Rasengan; the three giant toads leap into the air to fight the summons. Confronted by Pain's Preta Path, he uses Frog Kata to knock him out, using the natural energy around him to connect the blow despite the Path dodging his fist. Pain notices that Naruto has mastered Sage Mode, just like their master Jiraiya. Naruto is shocked that Pain was Jiraiya's pupil; Pain declares that as "student siblings", should have the same vision towards peace, involving Naruto sacrificing his life and handing over the Nine-Tails for that cause. Naruto angrily rejects Pain's ideology, asking if Pain considers his destruction of Konoha as peaceful, and proceeds to form his Wind Release: Rasenshuriken. The Hyūga shinobi relays to Sakura that Naruto has formed a chakra shuriken, which Sakura realises is the double-edged Rasenshuriken; however, instead of thrusting the Rasenshuriken physically, Naruto throws it at the four remaining Paths.