[Gods aren't immortal in his world.]

No, not the sky. Heavens is the world of gods... In a way, they pray to all the gods in general, instead of one particular god. But it's not like that in every region.

[He pauses to think.]

For instance, there is a country called Garam that worships the god of smithery Vulcan. The country itself is well knowns for its smiths and it is located right next to a volcano.