Godwyn The golden death (Elden Ring)

A man dies in disgrace, a mysterious being offers him a deal.
A man dies in disgrace, betrayed by his own family.
The two come together to form one being "Godwyn" the golden death.

It follows the story of Goldwyn who after the night of the black knives mingled with a being from our world who knows the story of his life and his world.
Godwyn will try to use this information to try to stop the approaching disaster. But this doesn't stop him from collecting a harem of demigoddesses and goddesses along the way, who by coincidence are his sisters.

This story will not be a story based on the video game, I will only use the characters and the world, so don't expect elements from the game in this fanfic. I will try to follow the lore, but there will be many changes in the story.

Obviously there will be strange things in this story like incest and stuff like that. What do you expect from a story written by George RR Martin combined with Miyazaki?