Game of Thrones with a Troop-Spawning System

After transmigrating into Game of Thrones: A Song of Ice and Fire, he becomes the lord of a small border town in the Northern Kingdom, where he builds a sanctuary and quietly raises his troops.

Arya, don't be afraid. Sansa, don't be silly. Daenerys, don't be so haughty. Just wait for me!

Winter is coming!?

The Others are at the gates!?

Night King, dragons, all of you will bow to me!

I will protect the North! I will rule the continent of Westeros!

The Three-Eyed Raven can forget about controlling the world!

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.