How Can I Be the Savior of the Starry Cultivator?

The great rift in the universe shattered, and powerful monsters came with spiritual energy, destroying the once powerful Galactic Empire. The remaining human race hid on various planets and lingered. The twelve demon gods wanted to sacrifice all races. The twelve star gods came with blessings and brought a practice system to all races. All races competed. However, all of this is in reincarnation.