As everyone seemed to escalate into more of a war the most notable was between Naruto and Stein against Sasuke. The now demonic creature once human appeared to have lost his humanity. He seemed to be able to use thousands of new powers never unlocked to him before. He and Naruto fought in a more powerful manner than Stein could keep up with and realized he had to take more drastic action as the power involved was with an evil mark on his back. Suddenly Sasuke jabbed forward with his claws and Stein barely avoided it when Sasuke teleported behind him and he was stabbed through the chest. The searing pain of whatever poison it was dripping from the claws just added to the wound.
Stein has suffered worse pains then this and knew what was to happen, and the madness finally started to drip from his soul and he gave into the madness. He stood back up and faced Sasuke with a maniacal smile "you're an interesting creature. I'm going to enjoy dissecting you piece by piece. Naruto then sped forward and started to make attempts to get a strike in, even with his speed the Sharingan was able to detect and Sasuke was able to react. However with Stein's insanity he was even more dangerous and he appeared behind Sasuke and slashed downward and Sasuke flew to the side and jabbed at Stein who blocked with Spirit "the more the prey struggles the better it is to feel the dissection." He started to laugh as he started up on witch hunter he pulled back and matching soul wavelengths perfectly with Spirit he summoned the evil vanquishing power. He launched forward and slashed Sasuke barely avoiding the attack but suddenly a gash appeared on his chest and blood started to flow from it. He grunted and bellowed over from the attack. Stein then raised spirit one more time prepared to cut off his head when Naruto charged and punched Sasuke with such strength that he was launched into the wall even with his wings trying to break before he could crash like he did. He tried to rise from the dust but collapsed back on the ground, however he appeared to be fading into dust. As in it slowly poured from his body leaving less of him and more of something or someone else.
Stein then calmed himself much to Spirit trying to get Stein to drop the madness. He felt the wound that Sasuke made earlier and sat on the ground unable to move with the paralyzing effect starting to take place. Spirit turned human in order to make sure Stein was alright when Stein spoke to him "Spirit, if need be, you go to Maka, I've done all I can here." Spirit nodded and realized Stein couldn't do much anymore. As he was struggling just to crawl to prop himself up to the wall. Stein took another cigarette and lit it, inhaled and exhaled the noxious fumes. Naruto's form finally dissipated and he collapsed on the ground with multiple burn marks across him and he seemed to have been somewhat absorbed by whatever that stuff was that surrounded him. He appeared to be resting peacefully, and the features that was projected seemed to have dissipated as well. Stein took out a needle and some string and started to try and stitch up the hole in his chest.