Uchiha Sasuke's Journey to Another World

(The plot is different from the original work, and I can't remember the main part. I just read it from the fanfic, so I'll just focus on the introduction) The Ninja World War ended, but Uchiha Sasuke fell into the bloody world of red eyes in the turbulence of time and space. Facing the decadent empire and the brutal Emperor's Arms user, he originally wanted to sit back and watch... When Akito handed the blood-stained Murasame into his hand, Sasuke held the Kusanagi sword and his samsara eyes suddenly opened: "Let the empire feel the pain." The next moment, the loud sound of Shenluo Tianzheng shook the sky...