Game of Thrones: King of Magic

Westeros is a land where intrigue, conspiracy and gold rule. A land where everyone has to look twice to avoid being stabbed in the back. A land that never expected one "insignificant" event - the arrival of a Pseudo-Servant capable of single-handedly destroying its foundations. With the knowledge of the modern world and the Servant's abilities, what changes will he make? And is Westeros ready for those very changes?