Eclipsing Eternity: The Godkiller's Pact

Writing Prompt #214 by writing.prompts.re on threads:

You thought you were being a dorky romantic by including an open challenge to every god in your wedding vows. Now, 4 centuries later, you're known through the cosmos as the "Godkiller" and your spouse is one of the most dangerous warriors in existence.

Aeon in the story is the same God as in:
https://www.wattpad.com/1459380761-aeon%27s-mantel-van-zielen