After a moment of shock at the sight of Shisui, Uchiha Itachi quickly regained his composure and activated his Mangekyō Sharingan.
Shisui was dead, so the person standing before him was most likely an illusion, or someone with ulterior motives using the Transformation Technique.
But such ninjutsu had nowhere to hide before his eyes. A single glance would reveal the truth.
Yet after he activated his Mangekyō Sharingan, the person before him remained completely unchanged.
"Shisui, is that really you? Didn't you die?"
"Uchiha Itachi!"
Shisui had already lost all reason. His eyes bloodshot, he swung the kunai in his hand again and again, unleashing ninjutsu at Uchiha Itachi.
The man before him was no longer the dear friend who had once shared his ideals and worked for the village and their clan. He was the enemy who had wiped out his entire clan, an enemy with whom he shared a blood feud.
"I see. So you're just like the other Uchiha, Shisui. Is this the extent of your capacity? Then I'll send you to your death alongside them."
Even with Shisui Uchiha standing before him, his thinking did not change. Instead, he became even more convinced that what he had done was right.
The Uchiha Clan was narrow-minded. Leaving them alive would have led to trouble sooner or later.
For Konoha's sake, he had to act. As for the Uchiha Clan, he had already left a spark alive.
"Shisui, you may have been my closest friend, but now you've become an obstacle. So forgive me, Shisui. Let me send you back to the Pure Land."
A red gleam flashed in Itachi's eyes.
"Amaterasu!"
His dōjutsu activated. Black flames appeared out of thin air and set Shisui's body ablaze.
Shisui immediately retreated with repeated uses of the Body Flicker Technique.