Ice and Fire: Conquering the World Starting from the Wall

In the year 299 of the Aegonian calendar, a red comet appeared, dragons were born, and the White Walkers were resurrected. A spaceship from another world traversed time and space, streaking across the sky of Westeros like a meteor, crashing north of the Wall and bringing conquerors from beyond the Wall to this world. From receiving the Blood Raven's gift to winning the loyalty of the Wildlings, Lynn Morningstar, raising the banner of "Guardian of all living beings in Westeros," crossed the Wall, starting from Hearth, the last city, and embarking step by step on his journey to unify Westeros. Clad in pale armor, riding a blood dragon, and wielding a Valyrian steel sword, he collected the "Guardian Tax" in the name of resisting the Long Night and the White Walkers, and sounded the horn to unify the known and unknown worlds. (Characters and plot are largely based on the original works; some points not clearly explained by Martin will refer to the TV series. There are many original ideas; discussion and corrections are welcome from A Song of Ice and Fire fans.) (Originally, the prefix was "A Song of Ice and Fire," but due to character limits, it has to be this way.)