Mercer had only swung a few dozen times just now, but the Black Blade Shusui felt perfectly natural in his hand. Every strike dealt one to two times the damage of his normal Dark Saber.
"There's one more Stone here. I wonder if it'll give me something too."
Mercer fixed his bright eyes on the remaining Mind Stone. He already had two Infinity Stones inside him, so absorbing a third should not be too difficult.
He immediately sat cross-legged and began absorbing it. With his previous experience, absorbing the Mind Stone really was not hard now.
Mercer had stored the other two Stones in his torso, but he deliberately placed the Mind Stone in his brain.
He used the Mind Stone's energy to temper his brain.
He believed this would also provide an especially tremendous boost to his Sharingan.
In fact, the Mind Stone enhanced his Sharingan even more than Mercer had expected.
Once he began absorbing the Mind Stone's energy, his Sharingan activated involuntarily.
The Sharingan gradually advanced: one-tomoe, two-tomoe, three-tomoe...
It was still advancing!
Mercer felt his eyes changing. He raised a hand and used reality power to create a mirror, then hurriedly examined his eyes.
After they became the Mangekyo Sharingan, the black patterns in his pupils slowly faded, and the red background of his eyes began to change as well.
The red gradually receded, replaced by a brilliant gold, while the original black patterns became concentric thin rings.
Several black tomoe adorned the two innermost rings.
"These are... the Six-Tomoe Rinnegan!"
Mercer exclaimed in surprise at the sight of his new eyes.
The Rinnegan's strength in Naruto needed no explanation. It was an incredibly powerful ocular ability possessed only by those few bosses at the very pinnacle, who could cause the protagonists enormous trouble.
Even outside