Hashirama didn't have any hidden injuries either. Strictly speaking, he could still run and jump even at a hundred years old.
He'd died simply because he didn't want to live anymore.
Otherwise, his cells wouldn't still have been so vigorous half a century later.
People like him were the worst. When the centenarian next door had a funeral, he'd barged right in, saying he wanted to absorb a hundred-year Soul Ring.
Liao Wu had transplanted Hashirama's cells. Now, except for Senjutsu-level Wood Style, he could learn every kind of Wood Style.
For example, the Wood Golem Technique and Wood Dragon Technique were powerful Ninjutsu on par with Perfect Susanoo.
Now, about the Sharingan.
Liao Wu pressed a hand to his eye socket, and his immense Pupil Power materialized directly into Susanoo's first form.
This was a gift from Madara's cells: the ultimate power of Yin Release, Indra's Sage eyes.
The purest Chakra and Mental Energy.
Madara's eyes were now the highest level, the Rinnegan, inheriting the Sage of Six Paths' most powerful Dojutsu.
Madara's bloodline had still degenerated quite a bit. If Liao Wu were Indra, he could already use Three Tomoe to unlock Perfect Susanoo.
According to the Book of Arrays, Indra had possessed incredibly powerful Pupil Power from birth.
He could unlock Perfect Susanoo with Three Tomoe.
That wasn't the Three Tomoe Sharingan as defined by the Uchiha Clan, but a Three Tomoe Eternal Mangekyo.
Although Liao Wu hadn't awakened the Mangekyo, his eyes were already infinitely close to Indra's, evolving toward the peak of Indra's Pupil Power.
The Uchiha method of killing their beloved to evolve the Sharingan into the Mangekyo had always been an Evil Path.
In the manga, Indra's Sharingan was innate. It wasn't awakened through Black Zetsu's guidance, as the anime had made up.