Genshin Impact: The Gods' Limits

I already know the price of gazing upon the gods... So tell me, what is the price of killing a god?

In the council of gods, no mortal voice is ever heard. And thus was the fate of the world arbitrarily determined. We know that such is the way of the world. But do the gods act out of contempt... Or have they at some hour begun to act out of fear?