Shizuka Uchiha supported Itachi Uchiha and asked with concern, "Itachi, your eyes..."
Itachi Uchiha waved a hand. "It's all right. Don't worry. I've just overused my eyes. Shizuka, I might lose my sight. I..."
Before Itachi Uchiha could finish, Shizuka Uchiha shook her head. "It's all right, Itachi. If you can't see anymore, let me be your eyes. I'll never leave you again."
Itachi Uchiha paused, then smiled. "All right. Then we'll never be apart again. You'll be my eyes."
Shizuka Uchiha asked anxiously, "Itachi, did we destroy him? Is that Thanatos dead?"
Itachi Uchiha shook his head. "No, he isn't dead yet, but he won't last much longer. Breaking free of the Ame-no-Murakumo's seal already damaged his soul. Besides, he was only a soul avatar, not the original. His damaged soul has no way to recover, so he'll disappear before long."
Only then did Shizuka Uchiha relax. She looked around and said, "Itachi, Black Zetsu escaped with Madara Uchiha's body."
"Yes, I know," Itachi Uchiha said calmly. "Black Zetsu wasn't the only one who left. Thanatos's soul remnant escaped too. It's possessing Madara Uchiha's body, but I no longer have the strength to pursue them." The moment he finished speaking, he passed out.
When Itachi Uchiha woke again, he was already in a cave. He opened his eyes, trying to make out his surroundings, but he could see nothing. There was only darkness.
Itachi Uchiha froze for a moment, then accepted it. After all, he had known this moment would come ever since he awakened his Mangekyō Sharingan.
Itachi Uchiha sat quietly, remembering the past: his clan, his village, the Shinobi World, war, peace, the ideals in his heart, Sasuke, and Naruto. At last, he smiled faintly. "It feels as though I've done everything in this life, yet never