Finally, ensure that the story is original, not a direct copy of existing canon, to avoid any copyright issues. Since it's fan fiction, it's generally accepted but better to err on the safe side by making it an original story set in a similar world.
Setting: The story could take place in a fictional region of Westeros. Maybe a borderland between the North and the Reach, where both houses have influence. The conflict could be between their philosophies but also an external threat from the East or the North. githubio a dance of fire and ice portable
A pact was sealed: House Emberlyn would lend their dragonfire, House Frostvale their ice-weaving. The armies marched south to the , where the eastern host waited. Finally, ensure that the story is original, not