One of the best parts of Shivering Isles was when I finally got my hands on Dawnfang/Duskfang (depending on the time) from that dungeon. Not only did it become more powerful (and different element depending on the time) with the more opponents you slayed, but it also regenerated it's magical power (I despised the lack of options of recharging weapons in Oblivion, especially since I was a sword and shield knight). It would also become weaker if the user didn't slay enough pray, as the sword itself was more or less alive.

I would love to see more enchanted weapons such as Dawnfang in Skyrim, with better and more interesting elemental effects. I also think it would be great if some of the weapons had consequences as well. A perfect example would be Umbra that appeared in both Morrowind and Oblivion. Whether it appears or not in Skyrim is debatable, but I think finding or creating these mystical weapons brings another fun factor to TES. Anyone have any ideas what kind of enchanted weapons BGS could implement in Skyrim? The possibilities are endless.

http://www.gamesas.com/index.php?/topic/1157714-official-ideas-suggestions-thread-4/

suggest stuff here instead of making more threads

If spears are back... add Hircine's spear, hunters spear ^^

I'm sure Umbra will be in Skyrim.
Anyway I have an idea for a special weapon though I'm not sure if it's been done. It would be a reward from a daedric shrine, you get to pick whether it's a mace/sword/bow and basically after you equip it once it drains your attributes unless you start killing with it. The more you kill, the more it puts up your various attributes. Maybe killing different types of enemy would give bonuses to certain attributes, while still putting your others up. eg killing orc puts your strength up more than the rest of your skils.

To get rid of the curse you have to put it back at the shrine where you got it.

I'm ok with consequences that aren't annoying. I'd prefer not to have to actually go out of my way to circumvent said consequences, from a purely gameplay perspective.