Why?
Sharingan irises bound in a pool of black stared into the red of the one who had forced him back into the plain of reality; back into the hell of mortality, though it was not known to him yet how long this would last. His pale skin was cracked, almost as if it were paper thin, and nothing but a layer of glue pasting it over a lifeless soul. Little would he know of how relevant his assumption was to the process. A single word of wondering had passed from lips with a laced in hostility. Yet it went unanswered, only to be returned with a cold stare of scarlet.
The truly living man could only observe the soul he had trapped in this temporary form, only one intent on having him being alive again. There were tasks not completed, things left unsaid, but only the spoken language would be reconciled here. Anything more, and this act could prove to be a downfall for more reasons than one.
How could you?
The words said in such bluntness, such lack of emotion, they produced a visible twinge from the other. Izuna watched him squirm, anger and hurt hidden behind a stoic front native to his bloodline. This is all he wanted now; to see his killer and reviver suffer, to writhe under his mere words. How dare he. In one instant, in one moment, everything and anything they ever held in utmost secret was cut in twain. Forever lost the minute the pain of the scar on his heart far outweighed the blade that pierced just below it.
Answer, will you?
A bowed head and blank aura had been presented throughout the encounter, words of a dead man louder than the silence of the one living. Anger. It finally flashed through the Uchiha's eyes. Whatever patience he had was gone. He tried to step forward, to concentrate chakra for a jutsu, alas, neither worked. Clearly, he had been restricted to only using his arms. He cursed the Senju under his breath for doing so. What he wouldn't do to have cast a raging torrent of fire right then and there. Though in latter thinking, he would be glad that he was unable to.
What…?
Two words. Two words was all it took to convert his outward anger into confusion, the likes of which displaced on the cracking skin of his face.
"I'm sorry." Insignificant words. That was all they were. That was all they could be.
Izuna's eyes locked with the now risen ones of Tobirama, as if peering into his very being. His features of usually cold, calm nature had melted to reveal what was really underneath; regret. Sharingan irises flickered, reading each and every possible detail of both the orbs of scarlet and his expression. Maybe, he was wrong.
No matter what was said, what was done could never be forgiven or forgotten, but perhaps, it could be accepted.
A strange sensation flooded over Izuna's temporary body, hands raising to be met by eyes. The sight was his skin and clothing turning white, the cracks spreading and pieces of a paper-like substances beginning to breakaway, flying off with the breeze. The seal had been broken, but only the Senju himself would know this. Finally, the Uchiha could move, though what he decided to do with his short remaining period bewildered the other.
A hand was placed gently on his cheek, no more words needed to signify the meaning.
Will I see you again?
A closed-eye, melancholy smile was given on dispersing features, and not until the very last possible second was the reply given.
"I'll be waiting for you."
Izuna's form disappeared from the world, leaving nothing behind but the sacrificed body and paper of the jutsu that should have never been created.