[ Millions... Ah. So he comes from around the time of the latest extinction event. Shortly before or after it, she'd wager. That makes him older than her, and most gods really. In his world, anyway. ]

I am from the Mesopotamian pantheon. [A pause.] When humans gained the faculties to question the world and took steps towards building the first of their many civilizations, aspects of nature were given sentience through their beliefs. This is who I - we - are.

[ Other gods in other pantheons may work differently, such as the Greek gods who were machine elevated to the status of gods through belief. But this is what she and those from her pantheon are.

... She's not going to explain the entire Fate/ lore, Godzilla learned more than enough in recent posts. ]

I must offer my apologies. You are much older than my sentient self.