Activating Hashirama Cells... No, Not Fusing with Them!

"You'll experience what I'm feeling soon enough, so I can't really complain."

"Just a warning: it doesn't feel good."

The Tenseigan Clone forced a faint smile, but the side effects wracking his body soon twisted his face into a grimace.

The devouring force of Hashirama Cells was nearly as deadly as the most potent poison, and even harder to control than rampaging natural energy.

Even Madara Uchiha, who had awakened the Rinnegan, had never truly fused with Hashirama Cells. He had merely grafted a piece of flesh onto his body, barely maintaining a balance between the cells and himself.

What Uchiha Ensei intended to do now was truly fuse with Hashirama Cells.

How?

Simple. Replace every cell in his body.

It sounded easy, but carrying it out was another matter. Even after years of research and calculations, the chance of death remained around eighty percent.

An eighty-percent chance of death was, for all practical purposes, a death sentence.

But the Little Ten-Tails, a clone grown from Ten-Tails cells, could release vast amounts of life force to keep the body alive.

That brought the experiment's death rate down to around thirty percent.

The risk was still high, but Uchiha Ensei had begun the experiment fully prepared to give up this body.

Whether it succeeded was not all that important. The process was what mattered.

So Uchiha Ensei also injected the Tenseigan Clone with portions of chakra extracted from Naruto Uzumaki and Sasuke. They should have contained traces of Asura's and Indra's reincarnation chakra as well.

"Seeing you in so much pain, maybe I should simply erase all the chakra afterward."

"Without chakra to carry the memories, they won't make it back to me."

"That would spare me the pain."

Uchiha Ensei watched the Tenseigan Clone's reactions and still had the leisure