Back on Itachi's side, after several long years of research, Tobirama had achieved a breakthrough.
It concerned using Flying Thunder God across Sealing Spaces, thereby allowing him to train both Sasuke and Izuna!
For this, Tobirama had adopted a rare, extremely serious attitude, even setting aside some of his evening time for resting and drinking.
However, he had not reduced the time he spent teaching Itachi at all. In fact, it had increased considerably.
By now, Itachi had learned the Flying Thunder God Technique. Combined with the swordsmanship Tobirama had personally taught him, he could already perform the Flying Thunder God Slash and a whole range of other maneuvers.
"Here, your eyeball."
The bathroom door opened, wisps of steam drifting out as a figure wearing only a white bathrobe emerged.
Expressionlessly, Tenzo plucked out his eyeball and tossed it to Itachi, who was resting on the sofa with his eyes closed.
In one fluid motion, Itachi caught the eyeball directly in a bottle, screwed on the cap, and sealed it inside a scroll.
Tenzo also sat down on the sofa and pressed his own eyeball back into place.
Feeling the warmth of his own eyeball, Tenzo could not help sighing. The eye he had been born with still felt the most familiar.
He had not used this original eyeball of his for a month. He had spent the first half of the month nourishing Kakashi's eye and the second half nourishing Itachi's.
That was pretty much how he had spent the past few years.
Actually, Kakashi had not wanted to trouble Tenzo at first, but as he continued carrying out missions, his eye had become a Mangekyō.
Tenzo had tried its ability. Yes, it felt very smooth... no, very practical, very powerful.
It was a space-based ability, and one that