Honkai: Star Rail: The Calamity Sword Saint

The sky began to fracture, and the earth began to melt. The planet was on the verge of collapse. San Hua, the planet’s Sword Saint, fought to save it. In the end, although he won, he still could not reverse the planet’s destruction.

The planet’s destruction unleashed a tremendous explosion that hurled San Hua into the reaches of space he had never touched before. He drifted through the stars until... he crashed into the Astral Express.