makes me think of Vitis and Gesheft, the steel and silver sword set from Witcher 3 that are the best available for a sign build. they're only accessible in one of the two branching paths in the final mission of the main quest of the second dlc. so if you want them, you have to choose that path, and then once you have them, the game's over, and you don't get to use them. only way for them to actually be useful is to make sure you get them both in a previous playthrough, and then start a ng+