I Chopped Down the Leaves with a Forty-Meter Sword

I chopped down the leaves with a forty-meter sword! You start with a knife, and all your abilities depend on sucking! Uchiha Itachi: "You will never be able to resist this move! Amaterasu!" Kanbara Byakuya: "Suck it for me!" "Ding, congratulations to the host for merging with Amaterasu. The blade has grown ten meters. Obtained an eternal flame." Uchiha Obito: "No one can attack me in the virtual state, except of course Kanbara Byakuya." Orochimaru: "Last time I was accidentally slashed by Kanbaru Byakuya. Fortunately, I turned into a little snake and escaped, otherwise I would have to meet the First Generation." Otsutsuki Kaguya: "Is the weapon a forty-meter sword? It's really unheard of and unseen." Uchiha Madara: "I, Uchiha Madara, would like to call Kanbara Byakuya the strongest!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.