I need to find a Game of Thrones quest. I know it was quite popular at some point, but I can't find it on here. I'm 90% sure it was titled The Prince That Was Promised, and it was a first-person story about a second son born after Joffrey, who grew up to be this huge behemoth of a man who was crazy good at using a warhammer.
He goes from kingdom to kingdom, smashing shit with his hammer and training his magic abilities (which I vaguely remember having to do with an ancient Creature trapped in an ornate Warhammer), and the last thing I can recall happening in this quest is the Main Character having a showdown with a Northern Tribe chief to decide the fate of the battle between the King's Army and the Tribe People.
I've searched term after term in the site's search engine and with google, but I cannot find it.
I'm not sure if I'm allowed to post pleas for help like this, but I don't know how else to find it. Please help
Edit: couldn't find it because I had the completely wrong name! It's titled murder and iron, by @Vesvius