Becoming a Returning Hero, I Fight Alone

[No system + no intelligence reduction + multiple reversals] There is always a shadow hanging in the sky of Ayers Continent - the arrival of the Demon King is never a legend, but a bloodstain that tears the sky apart every three hundred years. Just when Lan Xing's truck crashed into Yang Qianmo, he heard the call from another world. When I opened my eyes, I was already holding the sword, and my fate was carved into my bones and blood. He formed a team to walk through the scorched earth, slaying monsters, and finally defeated the Demon King Otto with thousands of people cheering. After fifty-six years of sword fighting, he gave up the crown and the hymn, and fell back into the fireworks of Blue Star with sword marks all over his body. The streets are still noisy, and no one remembers the ordinary person who disappeared in the car accident. He also forgot everything, lost his strength, and became a mortal again. But the tremors at midnight don't lie - the unknown terror is gnawing at the barriers of this world, and monsters from other worlds have begun to appear in Blue Star to kill people. Where will mankind go? The brave are not the only ones. They have no way out and are destined to be unable to survive alone. Rise and fight again, Yang Qianmo descended from the sky with his sword and killed all enemies in all directions.