Item identification
I think it would be cool that instead of using Id scrolls, you find and item and it stays unidentified. You can equip and use it like a regular weapon, but you don't know its properties. However, eventually you start to discover them. Maybe you hit a monster and it does cold damage.... so you look in your inventory and one of the mods is randomly generated(as opposed to the whole items mods being made at once) to be adds x amount of cold damage. I think this idea would be sweet, because people might take days or weeks to discover the hidden mods.
Maybe its indestructible, but it takes a wearing down of the unidentified items durability for the mod to reveal. Perhaps it gives off a spell 5% chance if hit, but you are a caster and don't get hit frequently. Thoughts?