Yeah too bad he didn'tTobirama was going to leave until orochimaru used his dna enhanced edo control on him. He had to be restrained by his brothers power. Orochimaru obviously knew that Tobirama could have gotten the hell outta there, and he had to prevent that.
Thank you. Roll em all you want, you know it's true. Let's wait till we see the sage, then we will finally be able to really compare who's stronger than who. I believe the Sage will be the LAST person revealed in the story.
Mmkay
