I Have a Quick Kendo System

Where in the world have you not gone? Where is out of reach? The world is in turmoil, people's hearts are sinister, and things are unpredictable. I only have one sword. Wherever the sword reaches, I will be the right one. If there is any bullying or injustice, I will draw the sword. The moment you touch the sword, you are a master of swordsmanship, and you can master the world of swordsmanship after just one day of practicing swordsmanship. From then on, the rivers and lakes are my back garden. Above the imperial court, I can cover the sky with one hand. The monarch is also my chess piece. The world is big and I am respected. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.