The Serpent's Pupil

is episode 113 of the Naruto: Shippūden anime.

Synopsis
Orochimaru's current body is at its limit, and the time to change bodies draws closer. Kabuto tries to ease Orochimaru's pain through medicine. Kabuto notes that Orochimaru's body is at its limit and Orochimaru is holding on through sheer will power. Orochimaru and Kabuto reminisce about the steps taken and all thats happened between the Konoha Invasion and now. As Orochimaru's condition becomes worse, Kabuto realizes that an increased dosage is necessary.

Orochimaru's excited at the thought of finally acquiring Sasuke's body and with it the Sharingan, he begins thinking of his journey of trying to acquire the Sharingan, from his failed attempt at Itachi, to everything he's done to acquire Sasuke. He notes that Sasuke is truly a genius, and nobody but him could have understood his thirst for power, and nobody could have trained Sasuke better than him. He notes that with enough time, Sasuke might even surpass Itachi.

Orochimaru then notices that there is someone outside his door, and commands him to show him self. Suddenly a lightning based chakra pierces through the door and head's towards Orochimaru. He blocks the technique with his hand. The door is slashed and Sasuke enters.

Sasuke explains to Orochimaru, about how pathetic Orochimaru is compared to the Uchiha's. A battle begins where Sasuke looks to have the advantage till Orochimaru switches to his true form. As Orochimaru attacks Sasuke, he switches to his Cursed Seal Level 2, and prepares to finish the battle.