D.E.M.O.N.S: Getting Summoned Weekly isn't so Bad - Chapter 1759 - Moral Quarry

Mo Yan was an illegitimate child of a rich family and was arranged by her mother to take the place of her sister in marriage to a poor man in order to fulfill the marriage contract set by the previous generation, allowing the Mo family to get their hands on that substantial dowry.

He—an enigmatic and cold-blooded soldier with a mysterious background.
She—a ruthless and bloodthirsty spy.

She was a peerless genius in the 24th Century – all she needed was a silver needle and she could practically bring anyone back from the dead.

Emperor Gabela: Imperial legions are unstoppable on land.

Great Orc Chief: All the warriors of the tribe can count as ten.

Jade Realm Elf King: The forest ranger has never missed a shot.

Chairman of the Horn Bay Alliance: The alliance fleet is the undisputed ruler of the sea.

A mysterious organization: The prophesied era will finally come.

Paul Grayman: I am not targeting anyone. Everyone here is rubbish.

Start the journey of guns and cannons crushing the low-magic plane…

(This is an old-fashioned story about climbing a technological tree in another world to farm for hegemony. The author has limited knowledge and may make some mistakes in technical details. Criticism and corrections are welcome)

- Description from novelbuddy