It all went down to Yagami and the mysterious opponent that he would face. Entering the dark room, a voice began to speak, "It's been awhile since we last met…" Yagami was stunned; how could he be familiar with an opponent he doesn't even recognize? He narrowed down to his Akatsuki clan members. While attempting to guess, the voice spoke again as a dark figure stood at the door opposite Yagami as a dim light lit across the room.
"At last I'll have my revenge, at last we can duel without any interruption…brother." The truth was revealed to be Yagami's deceased brother, the late Uchiha Itachi. But the Hokage predicted the Shinsengumi would send out an opponent like Itachi, never did he knew they actually would in turn resurrect him! Drawing his Izayoi, the Hokage wasted no time and attacked.
Itachi countered the move with his katana to block the oncoming strike. Over a couple of hours only did the swordfight come to a stop. Al of a sudden Itachi went on his knees, "Brother, you're right. Akatsuki is no more; Kisame, Sasori, Deidara and the others are dead, so why not let's start anew? You, me and Sasuke?"
"Silence! You've got to do better than that!" Yagami wasted no effort and struck at Itachi's left arm. Lying on the floor with blood bleeding profusely, he continued speaking, "Please brother, leave the past behind us!" Before landing another strike, flashes of the Uchiha brothers' memories appeared randomly in front of the Hokage before falling to the ground with a blade pointing inches away from his face. Itachi was standing, unscathed from any damage.
"Still the same as ever, you let your feelings dwell on you, that's what makes you weak." Itachi commented. Realizing it was all an illusion, Yagami hit Itachi's blade away and was gazed at the face. Seeing drops of blood dripping on the floor activated Yagami's cursed seal. Removing his coat, he picked up the Izayoi and began to unleash the darkness that was within him. He swung the blade but Itachi anticipated the move and hit Yagami back with the handle of his katana. The markings spreaded to his entire body, which was the limit Yagami could control but Itachi felt that he was still weak. The seal spreaded to his entire face and Yagami was engulfed with fiery black 'Amaterasu' flame.
"You're still weak. Lacking the hatred as always…" The demonic Yagami in the 'Bloodlust' form charged towards Itachi and performed his dark martial arts combo( Gou Shoryuken- Makekyo Sharingan- Tsukuyomi- Hyakki Shou- Hyakki Sen- Tenma Kuujin Kyaku- Zugai Hasutsu) almost smashing the entire room to pieces along with Itachi but it turned out to be a clone; his strength was wasted on a diversion as the real Itachi appeared from behind and stabbed the Hokage, driving the blade deeply through his abdomen. Itachi ensured that his brother was dead as Yagami dropped to the ground.
"Hmph, too easy." Just as Itachi was moments away from walking out of the room, a voice echoed the area, "Itachi…you forgot one thing…I died once too…and I…can be…resurrected." Ambling back, Itachi noticed to his shock as the Hokage slowly stood up with dragon wings grown from his back with an evil aura surrounding the room.