Hey, one of the best weapons in the game is called Chillrend. I'm guessing it's mercey frey's sword. To get it you need to follow the theives guild questline. Brynjolf will tell you to search in Mercer Frey's house where you go through a secret doorway. In an expert lock cabinet you will find Chillrend, you might need to bring a few lockpicks if you're not very good with locks. Anyway. The Chillrend is a glass sword that freezes the target. It's my favorite one-handed weapon.