Every god or goddess was a mortal first. They start out small and grow with their believers. The power of a deity stems from belief. The more followers a deity has the more power they have. it also correlates to how much belief a follower has in said deity. This is the story of Luka a new deity shoved into a new world from earth as earth is assimilated with the rest of the multiverse. He is the chosen deity of earth. Each full god/goddess must create their own universe to be assimilated at a certain point. Each time a universe is added a deity is created from one inhabitant. He will have to create a following and raise his power by preforming miracles and making people believe in him. Across multiple worlds and realities watch is his followers grow.