The Ring of Time: I Inherited Power from Beyond the Stars

To ensure the continued survival of this planet's civilization, the cosmic source's Water Wheel power is about to merge with Blue Star after detecting that a highly intelligent, highly adaptable species in the universe is on the verge of extinction. Blue Star's human race, struggling to survive, must complete its transformation amid the vast ocean of wasteland. When the invaders come knocking at the gates of the universe, wield this borrowed power and fight for a sliver of hope for your race and civilization.

------This book has an expansive worldbuilding scope. There is no golden finger, no transmigration, and no rebirth, and the story is not told in reverse chronological order. Readers who don't want to follow the early progression can skip ahead as needed.