I Can Cut Through Space with My Sword, so What Else Do I Need, the Sharingan?

Konoha 55, the night the Uchiha clan was exterminated. The full moon was like blood, a meteor streaked across the sky, and a star fell into the lake, causing a butterfly effect. A week later, Uchiha Sasuke's temperament changed drastically when he woke up from the genjutsu space. Seeing the reflection of Uchiha Itachi in the lake, he jumped into the water with hatred in his eyes. After falling to the bottom of the lake, he unexpectedly saw the glowing stars. After touching them, the system was bound. The kendo reward system means you get what you pay for. From a layman with a basic set of swordsmanship skills to a first-class swordsman with superb swordsmanship, to a swordsman master who can kill all things with his sword... "Itachi wants you to transplant his eyes and get the eternal Mangekyō Sharingan." After the brothers' battle, Uchiha Obito said this to Uchiha Sasuke in the cave. A sword tore through space, cutting off Uchiha Obito and the mountain peaks. Uchiha Sasuke said indifferently: "I can even cut off space, so what else do I need the Sharingan?"