This meant he had already surpassed the ordinary Rinnegan realm and entered an unprecedented level.
Not only that, but the spiral tattoo over Seiichi's right shoulder bone also began to heat up, as though responding to the changes in his eyes.
This tattoo inheritance had shown no fluctuations for a long time, but now it seemed to have formed some wondrous connection with his Rinnegan.
Seiichi began using his remaining energy to push his own overall evolution with all his might.
Shisui and Mu watched as Seiichi's body gradually grew taller, as though it were being inflated.
His build also expanded outward along with it. However, once Seiichi noticed, he intervened slightly to keep it under control.
As Seiichi's evolution neared its end, strange phenomena began appearing around his body.
The previously still air began to distort, as though some force were surging out of it.
Then a faint black mist began appearing in the air, rapidly spreading until it completely enveloped Seiichi's body.
Within the black mist, black lightning could vaguely be seen darting about, crackling as it went.
"What is this...?" Shisui and Mu exchanged a glance, each seeing the surprise in the other's eyes.
They had never seen such a strange sight and had no idea what power was at work.
As time passed, Seiichi's body began to change.
His skin became smoother and tougher, and his muscles became more developed.
"What is this...?" Shisui and Mu exchanged another glance, each seeing the confusion in the other's eyes.
They did not know what power was at work, nor did they know what Seiichi would become.
Just then, Seiichi's body suddenly erupted with even more intense dark energy. It completely surrounded him, leaving Shisui and Mu unable to make out the changes in him.
It was brief, lasting