Ever since the Titan race joined the heaven court, a large number of cultivators had left the middle and greater worlds. Without the encouragement of the heaven court, they left the eight barren universe and headed for the Titan race universe.
There were even Immortals from the heavenly court who watched the giant spirit race's battles and created giant spirit combat techniques or giant spirit combat bodies. They used their incarnations to impart Dao or set up sects in the giant spirit universe, which directly led to the development of the giant spirit universe.
Unlike the one-horned universe, the heavenly court didn't control the giant spirit universe. They didn't even form an Immortal City. After the heavenly Dao net was set up, they only conferred some Star Gods to take charge of the giant spirit universe.