"Sure."

Cam CC's both: Want to see if conjured magic eyes work on you guys?

"I didn't specify which eye," he says. "If conjured magic eyes don't work on them at all we can find that out just as well with Sharingan."

"Yeah, that's sensible."

"See you around." And he lets himself out.

He gets an email an hour later from Tobirama:

My brother and I are both amenable to trying. My brother wants to know if Sasuke cleared Sharingan-related experiments.

He seems amenable but feel free to confirm it with him directly.

A bit later:

We're available at your convenience. I'm more likely to be able to diagnose interactions with the resurrection technique, though.

Cam CC's Sasuke in case he wants to be present, asking when is good.

The consensus seems to be 'that evening'; Sasuke would like to be present.

Cam appears. "Any preliminaries we should go over? Should I do one eye or two?"

"What process are you planning for implantation? And one at first."

"Since you're not fragile and mortal and stuff my plan was to make the new eye in the socket, under the one you've got, pushing the preexisting eye out."

"If our eyes decline to be pushed that might cause trouble, but I could probably remove the entire area and let it regenerate."

"Right or left?"

"Left."

"Ready?"

"Yes."

Eyeball!

The ash making him up really does not want to be pushed out of the way; Cam can insist but the new eyeball will end up squished and then pushed out as Tobirama's old eye regenerates.

"Well, that didn't work. Sorry." Would Tobirama like a wet wipe.

He accepts it; at least nothing really sticks to his body.

"Not unexpected, though it answers some interesting questions about the resurrection technique's regeneration."

"What generalizations are you inclined to draw?"

"I'd known previously that objects inserted into an undead body will be forced out by the regeneration - that the regeneration can also force out things formed without an entry wound suggests that it follows something more like one's self-concept and adapts to that, rather than an inward-out regrowth."

"Huh. Do you think you'd reject superficial additions like tattoos? Or... hair dye?"

"I'm not sure. It'd be interesting to test."