The Current Obito

Summary
As the battle between Obito and Kakashi rages, they start to think back to their childhood days as young ninjas, when they would fight under instructions from their mentor, Minato Namikaze. Kakashi remembers the "old Obito", who was just like Naruto, and argues that to protect Naruto and the "old" Obito, he will have to defeat "the current Obito". Gaining leverage in their fight, Kakashi pierces Obito with a chakra-loaded kunai, leaving Obito heavily wounded.

As Kakashi observes, Obito returns to the real world, only to be betrayed by Madara, who proceeds to use Obito's body to prepare for his own resurrection.