Some unknown force suppressed Tsunade's fear of blood, and her survival instinct flipped over completely as she went toe-to-toe with Naruto.
The two of them fought with incredible ferocity.
They tore the entire Shikkotsu Forest to pieces, leaving huge craters and churned-up mud everywhere.
Fortunately, Sage Katsuyu was the only living creature in this area, so no one else got hurt.
In this battle, both Naruto and Tsunade emptied their deepest reserves.
Tsunade could not even maintain her Yin Seal, and Naruto forced it straight out of her body.
When the two of them traded blows, the natural energy of Shikkotsu Forest swirling around Naruto collided wildly with Tsunade's Yin Seal.
The Yin-attribute natural energy and the Yang-attribute natural energy inexplicably kneaded together, producing changes no one could have anticipated.
Supposedly, once the Yin Seal on Tsunade's forehead dissipated and the chakra inside leaked out, her face would age immediately.
Yet halfway through this battle, the internal activity in her body felt wrong.
The two streams of chakra stirred back and forth inside her, actually twisting her body back from the roots and forcefully making her younger.
It was not through the old method of using the Yin Seal to forcefully prop up her appearance.
Instead, from skin to bone, from the inside out, her entire body regressed.
To put it simply, Tsunade's lifespan was directly lengthened by more than double.
By proportion, she looked at most around twenty-something now.
Training in Senjutsu has never lacked severe side effects.
The two of them fought without eating or drinking for over three days and nights; only because Tsunade had such a sturdy constitution, carried the bloodline of the Senju Clan, and had the Yin Seal backing her up could she stubbornly withstand Naruto's fists.
If anyone else had been swapped in,