Whispers of a Dead Empire by Raizia

by being a domain god she is what keeps the domain as one, but she is a living human instead of a sphere, and she can move in/out of her domain if she has the strenght.
The only element she gets is undeath meaning zombie skeletons ghosts and any evolutions, her objective is to slowly weave a intricate story of this ancient made up empire cursed into undeath instead of just making simple challenges.
she is open to both external cooperation and conflicts, author notes mention mixes of magic and earth tech down the road, system notifications are very sparse and essential after the start.