"You Guys are the Main!!" is chapter 641 of the original Naruto manga.
Summary
With time running out on them as the ominous ball begins to glow even brighter, before any of them can react a regenerated Tobirama arrives to their aid. He grabs the orb and teleports to Obito whom he had managed to mark during their previous confrontation. As the orb expands some distance away from the shinobi, the real Tobirama arrives noting that it was a clone that was just destroyed. Elsewhere on the battlefield, the Allied Shinobi Forces watch on as the two titans Madara and Hashirama clash and as they look on awestruck that this was the level at which their predecessors fought, Shikamaru uses the opportunity to tell everyone — via Ino — that they were not to lose focus for a second because no matter how little power they had in comparison, even the smallest opening could be exploited. Meanwhile Obito emerges from the rubble unscathed having used the mysterious substance to protect himself, leading Minato and Tobirama to readjust their strategy. As they do this however, Sasuke rushes forth despite the Fourth's protests that he would create the opening and uses Amaterasu which Obito deflects. Not one to be outdone, Naruto follow suit correcting Sasuke and noting that they would be the ones to create the opening for the Second and Fourth to attack. While surprised, Tobirama nonetheless calls Minato to action, and both men mark each other with their respective Flying Thunder God seals intent on using the Flying Thunder God: Swap at the Same Moment Technique. With the preparations made, Sasuke and Naruto rush forth with another Kagutsuchi-infused Rasenshuriken while simultaneously, Tobirama appears behind Obito. Preparing to launch their attack, Minato teleports before them and is struck with the technique. Employing their own tactic, the Second and Fourth literally swap places and before he knows it, Obito is struck by the young shinobi's attack instead. Some ways away, Sakura sees the black flames and asks Hinata how her team-mates were doing. The Hyūga notes that both young men were smiling.
Trivia
- In this chapter, before Minato is hit by Naruto's and Sasuke's combination attack to complete the space-time ninjutsu technique. His right arm is shown to be regenerated in that panel but still missing in subsequent ones.