Time Travel Starts with Signing In

The male protagonist was originally an urban migrant worker. He traveled to the Starry Sky Continent where spiritual power was the standard for strength. From a weak bird, he got the sign-in system and became the strongest to dominate the world. The realms of strength in this book are divided into spiritual disciples, spiritual masters, spiritual masters, spiritual candidates, spiritual kings, spiritual emperors, spiritual sects, spiritual masters, spiritual saints, and spiritual emperors. They are divided into small spiritual emperors, great spiritual emperors, perfect spiritual emperors, great perfect spiritual emperors, spiritual gods, and the strongest. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.