With their calculative nature, a god wouldn’t easily leave their divine kingdom once it was created. The kingdom served as the best of defences for their true bodies. Even if any avatars they sent out were killed they could be made up for with time, but the death of their main bodies would be a true death.
Naturally, Leylin had learnt of this method as well, stationing his true body in his divine kingdom as he started on the endless task of developing it and his resources.
...
The hubbub over Leylin’s ascension died down after a while, but there was still some turbulence in the dark. Pope Tiff of the Giant Serpent Church infiltrated the prime material plane with a group of elite priests, beginning to publicise Leylin’s deeds.
Tiff was a legendary priest himself, and the ability of the numerous priests to cast spells up to rank 9 symbolised the power of a true god. With such backing, the Giant Serpent Church developed rapidly in the prime material plane.