As soon as Guo Feilong stepped into the city, he was deeply shocked. The concentration of Spiritual Energy here was comparable to that of a Fifth Grade Heavenly Abode small world in the ancient Celestial Court Immortal Cultivation world.

Guo Feilong could naturally sense that there was a massive Gathering Spirit Array within the city, drawing Spiritual Energy from all directions and the earth itself, making the Spiritual Energy within the city even more abundant.

The city was enormous, with walls stretching about a thousand kilometers on each side. Although its area wasn't as vast as the Fifth Grade Heavenly Abode small world of the ancient Celestial Court, the number of such Immortal Cultivation cities in the Fuxi Immortal Cultivation world must be extremely high.

On his way here with Luo Lier and the others, he had seen many cities of this scale from the sky.