After learning that Jiraiya has been killed by the Akatsuki leader, Pain, Naruto prepares for a future encounter by learning toad-style Senjutsu, a power-enhancing ability involving the gathering of natural energy [REF].
When Naruto discovers Sasuke's plan to attack the Leaf Village, he decides to confront him in a battle which could end both their lives should Naruto be unable to save him [REF].